12531408 has 20 divisors (see below), whose sum is σ = 32372928. Its totient is φ = 4177120.

The previous prime is 12531391. The next prime is 12531437. The reversal of 12531408 is 80413521.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130488 + ... + 130583.

Almost surely, 2^12531408 is an apocalyptic number.

It is an amenable number.

12531408 is an abundant number, since it is smaller than the sum of its proper divisors (19841520).

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

12531408 is a wasteful number, since it uses less digits than its factorization.

12531408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261082 (or 261076 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 12531408 is about 3539.9728812521. The cubic root of 12531408 is about 232.2736564702.

Adding to 12531408 its reverse (80413521), we get a palindrome (92944929).

The spelling of 12531408 in words is "twelve million, five hundred thirty-one thousand, four hundred eight".