130 (number)

Natural number

← 129 130 131 →
← 130 131 132 133 134 135 136 137 138 139 → List of numbers Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	one hundred thirty
Ordinal	130th (one hundred thirtieth)
Factorization	2 ×ばつ 5 ×ばつ 13
Divisors	1, 2, 5, 10, 13, 26, 65, 130
Greek numeral	ΡΛ ́
Roman numeral	CXXX, cxxx
Binary	10000010₂
Ternary	11211₃
Senary	334₆
Octal	202₈
Duodecimal	AA₁₂
Hexadecimal	82₁₆

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

In mathematics

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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]

There is no value n between 130 and 4 ×ばつ 130 = 520, such that 2ⁿ − 1, the nth Mersenne number, is prime. As of February 2026, 130 is the largest known integer with this property.