131285764 has 27 divisors (see below), whose sum is σ = 244786143. Its totient is φ = 61598208.

The previous prime is 131285701. The next prime is 131285779. The reversal of 131285764 is 467582131.

The square root of 131285764 is 11458.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 412164 + 130873600 = 642^2 + 11440^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 389404 + ... + 389740.

Almost surely, 2^131285764 is an apocalyptic number.

131285764 is the 11458-th square number.

It is an amenable number.

131285764 is a deficient number, since it is larger than the sum of its proper divisors (113500379).

131285764 is an equidigital number, since it uses as much as digits as its factorization.

131285764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 356 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The cubic root of 131285764 is about 508.2443334527.

The spelling of 131285764 in words is "one hundred thirty-one million, two hundred eighty-five thousand, seven hundred sixty-four".