12564238 has 16 divisors (see below), whose sum is σ = 19983744. Its totient is φ = 5914080.

The previous prime is 12564193. The next prime is 12564247. The reversal of 12564238 is 83246521.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445 + ... + 5032.

It is an arithmetic number, because the mean of its divisors is an integer number (1248984).

Almost surely, 2^12564238 is an apocalyptic number.

12564238 is a deficient number, since it is larger than the sum of its proper divisors (7419506).

12564238 is a wasteful number, since it uses less digits than its factorization.

12564238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5547.

The product of its digits is 11520, while the sum is 31.

The square root of 12564238 is about 3544.6068893461. The cubic root of 12564238 is about 232.4763177790.

The spelling of 12564238 in words is "twelve million, five hundred sixty-four thousand, two hundred thirty-eight".