130 (number)
# 130 (number)

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: $1^2$ + $2^2$ + $5^2$ + $10^2$ = 130.

130 is the largest number that cannot be written as the sum of four hexagonal numbers.

130 equals both $2^7$ + 2 and $5^3$ + 5 and is therefore a doubly strictly adsurd number.

## 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.

## In other fields

One hundred [and] thirty is also:

* The year AD 130 or 130 BC
* The 130 nanometer process is a semiconductor process technology by semiconductor companies
* A 130-30 fund or a ratio up to 150/50 is a type of collective investment vehicle
* The C130 Hercules aircraft
