2506556 has 48 divisors (see below), whose sum is σ = 5174400. Its totient is φ = 1052352.

The previous prime is 2506549. The next prime is 2506561. The reversal of 2506556 is 6556052.

It is a super-2 number, since 2×2506556² = 12565645962272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42455 + ... + 42513.

It is an arithmetic number, because the mean of its divisors is an integer number (107800).

2^2506556 is an apocalyptic number.

2506556 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2506556 is an abundant number, since it is smaller than the sum of its proper divisors (2667844).

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

2506556 is a wasteful number, since it uses less digits than its factorization.

2506556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 2506556 is about 1583.2106619146. The cubic root of 2506556 is about 135.8394154210.

The spelling of 2506556 in words is "two million, five hundred six thousand, five hundred fifty-six".