131265540 has 72 divisors (see below), whose sum is σ = 455058240. Its totient is φ = 30003264.

The previous prime is 131265499. The next prime is 131265557. The reversal of 131265540 is 45562131.

131265540 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 655 + 4 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50830 + ... + 53349.

Almost surely, 2^131265540 is an apocalyptic number.

131265540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131265540 is an abundant number, since it is smaller than the sum of its proper divisors (323792700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131265540 is a wasteful number, since it uses less digits than its factorization.

131265540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104201 (or 104196 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 131265540 is about 11457.1174385183. The cubic root of 131265540 is about 508.2182345040.

The spelling of 131265540 in words is "one hundred thirty-one million, two hundred sixty-five thousand, five hundred forty".