2556555 has 16 divisors (see below), whose sum is σ = 4191264. Its totient is φ = 1329920.

The previous prime is 2556523. The next prime is 2556559. The reversal of 2556555 is 5556552.

It is not a de Polignac number, because 2556555 - 2⁵ = 2556523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2556559) 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, 1464 + ... + 2693.

It is an arithmetic number, because the mean of its divisors is an integer number (261954).

2^2556555 is an apocalyptic number.

2556555 is a deficient number, since it is larger than the sum of its proper divisors (1634709).

2556555 is a wasteful number, since it uses less digits than its factorization.

2556555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4206.

The product of its digits is 37500, while the sum is 33.

The square root of 2556555 is about 1598.9230750727. The cubic root of 2556555 is about 136.7366849887.

The spelling of 2556555 in words is "two million, five hundred fifty-six thousand, five hundred fifty-five".