130 (number)
Natural number
From Wikipedia, the free encyclopedia
130 (one hundred [and] thirty) is the natural number following 129 and preceding 131.
Cardinalone hundred thirty
Ordinal130th
(one hundred thirtieth)
(one hundred thirtieth)
Factorization2 Ã 5 Ã 13
Divisors1, 2, 5, 10, 13, 26, 65, 130
| ||||
|---|---|---|---|---|
| Cardinal | one hundred thirty | |||
| Ordinal | 130th (one hundred thirtieth) | |||
| Factorization | 2 Ã 5 Ã 13 | |||
| Divisors | 1, 2, 5, 10, 13, 26, 65, 130 | |||
| Greek numeral | Ρδ | |||
| Roman numeral | CXXX, cxxx | |||
| Binary | 100000102 | |||
| Ternary | 112113 | |||
| Senary | 3346 | |||
| Octal | 2028 | |||
| Duodecimal | AA12 | |||
| Hexadecimal | 8216 | |||
In mathematics
130 is a sphenic number. It is a noncototient since there is no answer to the equation x - Ï(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.
130 is the largest number that cannot be written as the sum of four hexagonal numbers.[1]
130 equals both 27 + 2 and 53 + 5 and is therefore a doubly strictly adsurd number.[2]
There is no value n between 130 and 4 Ã 130 = 520, such that 2n â 1, the nth Mersenne number, is prime. As of February 2026, 130 is the largest known integer with this property.
In other fields
- A 130-30 fund or a ratio up to 150/50 is a type of collective investment vehicle