12556923 has 4 divisors (see below), whose sum is σ = 16742568. Its totient is φ = 8371280.

The previous prime is 12556879. The next prime is 12556933. The reversal of 12556923 is 32965521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32965521 = 3 ⋅10988507.

It is a cyclic number.

It is not a de Polignac number, because 12556923 - 2²² = 8362619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12556933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2092818 + ... + 2092823.

It is an arithmetic number, because the mean of its divisors is an integer number (4185642).

Almost surely, 2^12556923 is an apocalyptic number.

12556923 is a deficient number, since it is larger than the sum of its proper divisors (4185645).

12556923 is an equidigital number, since it uses as much as digits as its factorization.

12556923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185644.

The product of its digits is 16200, while the sum is 33.

The square root of 12556923 is about 3543.5748898535. The cubic root of 12556923 is about 232.4311924957.

The spelling of 12556923 in words is "twelve million, five hundred fifty-six thousand, nine hundred twenty-three".