12431136 has 24 divisors (see below), whose sum is σ = 32631984. Its totient is φ = 4143680.

The previous prime is 12431117. The next prime is 12431143. The reversal of 12431136 is 63113421.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64650 + ... + 64841.

It is an arithmetic number, because the mean of its divisors is an integer number (1359666).

Almost surely, 2^12431136 is an apocalyptic number.

12431136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12431136 is an abundant number, since it is smaller than the sum of its proper divisors (20200848).

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

12431136 is a wasteful number, since it uses less digits than its factorization.

12431136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129504 (or 129496 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 12431136 is about 3525.7816154720. The cubic root of 12431136 is about 231.6524721447.

Adding to 12431136 its reverse (63113421), we get a palindrome (75544557).

The spelling of 12431136 in words is "twelve million, four hundred thirty-one thousand, one hundred thirty-six".