12431056 has 30 divisors (see below), whose sum is σ = 26477906. Its totient is φ = 5649600.

The previous prime is 12431033. The next prime is 12431057. The reversal of 12431056 is 65013421.

It can be written as a sum of positive squares in only one way, i.e., 9486400 + 2944656 = 3080^2 + 1716^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12431057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1275 + ... + 5146.

Almost surely, 2^12431056 is an apocalyptic number.

12431056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12431056 is an abundant number, since it is smaller than the sum of its proper divisors (14046850).

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

12431056 is a wasteful number, since it uses less digits than its factorization.

12431056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6451 (or 6434 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 12431056 is about 3525.7702704516. The cubic root of 12431056 is about 231.6519752140.

Adding to 12431056 its reverse (65013421), we get a palindrome (77444477).

The spelling of 12431056 in words is "twelve million, four hundred thirty-one thousand, fifty-six".