12529431 has 16 divisors (see below), whose sum is σ = 18789120. Its totient is φ = 8250840.

The previous prime is 12529427. The next prime is 12529471. The reversal of 12529431 is 13492521.

It is not a de Polignac number, because 12529431 - 2² = 12529427 is a prime.

It is a super-2 number, since 2×12529431² = 313973282367522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12529395 and 12529404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12529471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555 + ... + 5036.

It is an arithmetic number, because the mean of its divisors is an integer number (1174320).

Almost surely, 2^12529431 is an apocalyptic number.

12529431 is a deficient number, since it is larger than the sum of its proper divisors (6259689).

12529431 is an equidigital number, since it uses as much as digits as its factorization.

12529431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5683 (or 5677 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 12529431 is about 3539.6936308104. The cubic root of 12529431 is about 232.2614410519.

The spelling of 12529431 in words is "twelve million, five hundred twenty-nine thousand, four hundred thirty-one".