130 (number): Difference between revisions

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

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]

One hundred [and] thirty is also:

The year AD130 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

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-'''130''' (''one hundred [and] thirty'') is the [[natural number]] following [[120 (number)|129]] and preceding [[131 (number)|131]].
+'''130''' (''one hundred [and] thirty'') is the [[natural number]] following [[129 (number)|129]] and preceding [[131 (number)|131]].
 ==In mathematics==