131525406 has 12 divisors (see below), whose sum is σ = 284971752. Its totient is φ = 43841796.

The previous prime is 131525351. The next prime is 131525423. The reversal of 131525406 is 604525131.

131525406 is a `hidden beast` number, since 131 + 525 + 4 + 0 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131525406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3653466 + ... + 3653501.

It is an arithmetic number, because the mean of its divisors is an integer number (23747646).

Almost surely, 2^131525406 is an apocalyptic number.

131525406 is an abundant number, since it is smaller than the sum of its proper divisors (153446346).

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

131525406 is a wasteful number, since it uses less digits than its factorization.

131525406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7306975 (or 7306972 counting only the distinct ones).

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

The square root of 131525406 is about 11468.4526419217. The cubic root of 131525406 is about 508.5533861452.

The spelling of 131525406 in words is "one hundred thirty-one million, five hundred twenty-five thousand, four hundred six".