12456939 has 16 divisors (see below), whose sum is σ = 18370944. Its totient is φ = 7444800.

The previous prime is 12456929. The next prime is 12456943. The reversal of 12456939 is 93965421.

It is not a de Polignac number, because 12456939 - 2⁸ = 12456683 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12456897 and 12456906.

It is not an unprimeable number, because it can be changed into a prime (12456929) 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, 177 + ... + 4994.

It is an arithmetic number, because the mean of its divisors is an integer number (1148184).

Almost surely, 2^12456939 is an apocalyptic number.

12456939 is a deficient number, since it is larger than the sum of its proper divisors (5914005).

12456939 is a wasteful number, since it uses less digits than its factorization.

12456939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5258.

The product of its digits is 58320, while the sum is 39.

The square root of 12456939 is about 3529.4389072486. The cubic root of 12456939 is about 231.8126398032.

The spelling of 12456939 in words is "twelve million, four hundred fifty-six thousand, nine hundred thirty-nine".