2556885 has 32 divisors (see below), whose sum is σ = 4465152. Its totient is φ = 1244160.

The previous prime is 2556877. The next prime is 2556907. The reversal of 2556885 is 5886552.

2556885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2556885 - 2³ = 2556877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9300 + ... + 9570.

It is an arithmetic number, because the mean of its divisors is an integer number (139536).

2^2556885 is an apocalyptic number.

It is an amenable number.

2556885 is a deficient number, since it is larger than the sum of its proper divisors (1908267).

2556885 is a wasteful number, since it uses less digits than its factorization.

2556885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333.

The product of its digits is 96000, while the sum is 39.

The square root of 2556885 is about 1599.0262662008. The cubic root of 2556885 is about 136.7425680572.

It can be divided in two parts, 255 and 6885, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 2556885 in words is "two million, five hundred fifty-six thousand, eight hundred eighty-five".