2556504 has 24 divisors (see below), whose sum is σ = 6924060. Its totient is φ = 852144.

The previous prime is 2556503. The next prime is 2556509. The reversal of 2556504 is 4056552.

2556504 is a `hidden beast` number, since 2 + 5 + 5 + 650 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17682 + ... + 17825.

2^2556504 is an apocalyptic number.

2556504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2556504 is an abundant number, since it is smaller than the sum of its proper divisors (4367556).

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

2556504 is a wasteful number, since it uses less digits than its factorization.

2556504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35519 (or 35512 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 2556504 is about 1598.9071267588. The cubic root of 2556504 is about 136.7357757420.

The spelling of 2556504 in words is "two million, five hundred fifty-six thousand, five hundred four".