131235684 has 24 divisors (see below), whose sum is σ = 306528768. Its totient is φ = 43700640.

The previous prime is 131235667. The next prime is 131235691. The reversal of 131235684 is 486532131.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8014 + ... + 18074.

It is an arithmetic number, because the mean of its divisors is an integer number (12772032).

Almost surely, 2^131235684 is an apocalyptic number.

It is an amenable number.

131235684 is an abundant number, since it is smaller than the sum of its proper divisors (175293084).

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

131235684 is a wasteful number, since it uses less digits than its factorization.

131235684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11155 (or 11153 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 131235684 is about 11455.8144188879. The cubic root of 131235684 is about 508.1797006178.

The spelling of 131235684 in words is "one hundred thirty-one million, two hundred thirty-five thousand, six hundred eighty-four".