12531396 has 12 divisors (see below), whose sum is σ = 29239952. Its totient is φ = 4177128.

The previous prime is 12531391. The next prime is 12531437. The reversal of 12531396 is 69313521.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (12531391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522130 + ... + 522153.

Almost surely, 2^12531396 is an apocalyptic number.

It is an amenable number.

12531396 is an abundant number, since it is smaller than the sum of its proper divisors (16708556).

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

12531396 is a wasteful number, since it uses less digits than its factorization.

12531396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044290 (or 1044288 counting only the distinct ones).

The product of its digits is 4860, while the sum is 30.

The square root of 12531396 is about 3539.9711863234. The cubic root of 12531396 is about 232.2735823289.

The spelling of 12531396 in words is "twelve million, five hundred thirty-one thousand, three hundred ninety-six".