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One hundred twenty (in American English; written and spoken as One hundred and twenty in British English and other english forms) (120, CXX) is the natural number following one hundred nineteen and preceding one hundred twenty-one. It is a triangular number as well as a composite number, with its divisors being 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 25, 30 and 60, making it a highly composite number, and its factorization is
This number is also the sum of a twin prime (59 + 61) as well as the sum of four consecutive primes (23 + 29 + 31 + 37). 120 is the smallest number to appear six times in Pascal's triangle. Five factorial is equal to 120.
| 120 | |
|---|---|
| Cardinal | One hundred twenty |
| Ordinal | 120th |
| Factorization | |
| Roman numeral | CXX |
| Binary | 1111000 |
| Hexadecimal | 78 |
One hundred twenty figures in Fermat's modified Diophantine problem as the largest known integer of the sequence 1, 3, 8, 120. Fermat wanted to find another positive integer that multiplied with any of the other numbers in the sequence yields a number that is one less than a square. Euler also searched for this number, but failed to find it, but did find a fractional number that meets the other conditions, 777480 / 287922.
See also: one hundred, one hundred ten, one hundred twenty, one hundred thirty
One hundred twenty is also:
- Very significant in the Holy Bible, being ten times the number of tribes of Israel. It is the age Moses died at (Deuteronomy 34:7), the cubits of the height of the Temple (2 Chronicles 3:4), the number of princes King Darius set over his kingdom (Daniel 6:2), the number of talents of gold Queen Sheba gave to King Solomon in tribute (1 Kings 10:10), and the weight in shekels of total gold spoons offered by each tribe of Israel (Numbers 7:86).
- A medium film format introduced by Kodak in 1901 and still in use in 2004.
One hundred twenty-one (121, CXXI) is the natural number following one hundred twenty and preceding one hundred twenty-two. It is a composite number, and its factorization is
This number is the sum of three consecutive primes (37 + 41 + 43).
One hundred twenty-one is also:
- The model number of the Lockheed EC-121, now on display at the Air Force Museum.
One hundred twenty-two (122, CXXII) is the natural number following one hundred twenty-one and preceding one hundred twenty-three. It is a composite number, and its factorization is
One hundred twenty-two is also:
- The number of men of Michmas at the Census (Holy Bible, Nehemiah 7:31).
One hundred twenty-three (123, CXXIII) is the natural number following one hundred twenty-two and preceding one hundred twenty-four. It is a Lucas number and a composite number, and its factorization is
One hundred twenty-three is also:
This article is about the number. For the year AD 123, see 123.
One hundred twenty-four (124, CXXIV) is the natural number following one hundred twenty-three and preceding one hundred twenty-five. It is a composite number, and its factorization is
It is the sum of eight consecutive primes (5 + 7 + 11 + 13 + 17 + 19 + 23 + 29).
One hundred twenty-four is also:
This article is about the number. For the year AD 124, see 124.
One hundred twenty-five (125, CXXV) is the natural number following one hundred twenty-four and preceding one hundred twenty-six. It is a composite number, and its factorization is
One hundred twenty-five is also:
This article is about the number. For the year AD 125, see 125.
One hundred twenty-six (126, CXXVI) is the natural number following one hundred twenty-five and preceding one hundred twenty-six. It is a composite number, with divsisors 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, making it an abundant number, and its factorization is
One hundred twenty-six is also:
- The designation of a spur route of Interstate 26 in Columbia, South Carolina.
One hundred twenty-seven is discussed on its own page.
One hundred twenty-eight (128, CXXVIII) is the natural number following one hundred twenty-seven and preceding one hundred twenty-eight. It is a composite number, and its factorization is
It is the largest number which can not be expressed as the sum of different squares.
One hundred twenty-eight is also:
- The size, in bits, of certain integer data types, used in computer representations of numbers.
- The number of sons of Anathoth at the Census of men of Israel upon return from exile (Holy Bible, Ezra 2:23). Also, the number of singers, sons of Asaph (Ezra 2:41).
- In megabytes, a common size for flash disks and memory cards.
- The number of musical instruments specified in General MIDI. Sometimes they are numbered 0 to 127 and sometimes they are numbered 1 to 128.
One hundred twenty-nine (129, CXXIX) is the natural number following one hundred twenty-eight and preceding one hundred thirty. It is a composite number, and its factorization is
This number is the sum of the first ten prime numbers.
One hundred twenty-nine is also:
- The designation of a spur route of Interstate 29 in Sioux City, Iowa.
