12564426 has 32 divisors (see below), whose sum is σ = 28844928. Its totient is φ = 3574080.

The previous prime is 12564421. The next prime is 12564427. The reversal of 12564426 is 62446521.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12564393 and 12564402.

It is not an unprimeable number, because it can be changed into a prime (12564421) 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 15 ways as a sum of consecutive naturals, for example, 11796 + ... + 12816.

It is an arithmetic number, because the mean of its divisors is an integer number (901404).

Almost surely, 2^12564426 is an apocalyptic number.

12564426 is an abundant number, since it is smaller than the sum of its proper divisors (16280502).

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

12564426 is a wasteful number, since it uses less digits than its factorization.

12564426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326.

The product of its digits is 11520, while the sum is 30.

The square root of 12564426 is about 3544.6334084077. The cubic root of 12564426 is about 232.4774772957.

The spelling of 12564426 in words is "twelve million, five hundred sixty-four thousand, four hundred twenty-six".