2564004 has 24 divisors (see below), whose sum is σ = 6123040. Its totient is φ = 834624.

The previous prime is 2563997. The next prime is 2564011. The reversal of 2564004 is 4004652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2563997) and next prime (2564011).

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, 1969 + ... + 3000.

2^2564004 is an apocalyptic number.

It is an amenable number.

2564004 is an abundant number, since it is smaller than the sum of its proper divisors (3559036).

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

2564004 is a wasteful number, since it uses less digits than its factorization.

2564004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5019 (or 5017 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2564004 is about 1601.2507611239. The cubic root of 2564004 is about 136.8693588301.

Adding to 2564004 its reverse (4004652), we get a palindrome (6568656).

The spelling of 2564004 in words is "two million, five hundred sixty-four thousand, four".