12531400 has 48 divisors (see below), whose sum is σ = 33301440. Its totient is φ = 4296000.

The previous prime is 12531391. The next prime is 12531437. The reversal of 12531400 is 413521.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3076 + ... + 5875.

It is an arithmetic number, because the mean of its divisors is an integer number (693780).

Almost surely, 2^12531400 is an apocalyptic number.

12531400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12531400 is an abundant number, since it is smaller than the sum of its proper divisors (20770040).

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

12531400 is a wasteful number, since it uses less digits than its factorization.

12531400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8974 (or 8965 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 12531400 is about 3539.9717512997. The cubic root of 12531400 is about 232.2736070427.

Adding to 12531400 its reverse (413521), we get a palindrome (12944921).

The spelling of 12531400 in words is "twelve million, five hundred thirty-one thousand, four hundred".