# 130 (number)

 ← 129 130 131 →
Cardinalone hundred thirty
Ordinal130th
(one hundred thirtieth)
Factorization2 × 5 × 13
Divisors1, 2, 5, 10, 13, 26, 65, 130
Greek numeralΡΛ´
Roman numeralCXXX
Binary100000102
Ternary112113
Octal2028
DuodecimalAA12

130 (one hundred [and] thirty) is the natural number following 129 and preceding 131.

## In mathematics

130 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.

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][unreliable source?]

## In religion

The Book of Genesis states Adam had Seth at the age of 130. The Second Book of Chronicles says that Jehoiada died at the age of 130.[3]

## In other fields

One hundred [and] thirty is also:

## References

1. ^ MathWorld - Hexagonal Number
2. ^ Mackenzie, Dana (2018). "2184: An Absurd (and Adsurd) Tale". Integers. 18.
3. ^ 2 Chronicles 24:15