12566004 has 48 divisors (see below), whose sum is σ = 33384960. Its totient is φ = 3641440.

The previous prime is 12566003. The next prime is 12566023. The reversal of 12566004 is 40066521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12566003) 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, 967 + ... + 5105.

It is an arithmetic number, because the mean of its divisors is an integer number (695520).

Almost surely, 2^12566004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12566004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16692480).

12566004 is an abundant number, since it is smaller than the sum of its proper divisors (20818956).

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

12566004 is a wasteful number, since it uses less digits than its factorization.

12566004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180 (or 4178 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 12566004 is about 3544.8559914332. The cubic root of 12566004 is about 232.4872093784.

It can be divided in two parts, 1256 and 6004, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 12566004 in words is "twelve million, five hundred sixty-six thousand, four".