130 (number)
Encyclopedia : 1 : 13 : 130 : 130 (number)
130 is the natural number following 129 and preceding 131.
| Cardinal | One hundred [and] thirty |
| Ordinal | 130th |
| Factorization | [2 \cdot 5 \cdot 13] |
| Divisors | 2, 5, 10, 13, 26, 65 |
| Roman numeral | CXXX |
| Binary | 10000010 |
| Hexadecimal | 82 |
In mathematics
One hundred [and] thirty is a sphenic number. It is a noncototient since there is no answer to the equation x - φ(x) = 130.130 is the only integer that is the sum of the squares of its first four divisors, including 1: 12 + 22 + 52 + 102 = 130.
In other fields
One hundred [and] thirty is also:- The designation of a spur route of Interstate 30 to be built in Texarkana, Texas.
- The model number of the C-130 aircraft, capable of in-the-air refueling.
- United States Citizenship and Immigration Services Form Petition for an Alien Relative.
- The year AD 130 or 130 BC.
- The number largest ever detonated nuclear test, Tsar bomb
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