12564069 has 16 divisors (see below), whose sum is σ = 19248768. Its totient is φ = 7140672.

The previous prime is 12564061. The next prime is 12564077. The reversal of 12564069 is 96046521.

It is an interprime number because it is at equal distance from previous prime (12564061) and next prime (12564077).

It is not a de Polignac number, because 12564069 - 2³ = 12564061 is a prime.

It is a super-2 number, since 2×12564069² = 315711659673522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12564061) 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, 2619 + ... + 5655.

It is an arithmetic number, because the mean of its divisors is an integer number (1203048).

Almost surely, 2^12564069 is an apocalyptic number.

It is an amenable number.

12564069 is a deficient number, since it is larger than the sum of its proper divisors (6684699).

12564069 is a wasteful number, since it uses less digits than its factorization.

12564069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3244.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 12564069 is about 3544.5830502331. The cubic root of 12564069 is about 232.4752754377.

The spelling of 12564069 in words is "twelve million, five hundred sixty-four thousand, sixty-nine".