2556567 has 12 divisors (see below), whose sum is σ = 3977064. Its totient is φ = 1573200.

The previous prime is 2556559. The next prime is 2556569. The reversal of 2556567 is 7656552.

It is not a de Polignac number, because 2556567 - 2³ = 2556559 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10809 + ... + 11042.

It is an arithmetic number, because the mean of its divisors is an integer number (331422).

2^2556567 is an apocalyptic number.

2556567 is a deficient number, since it is larger than the sum of its proper divisors (1420497).

2556567 is a wasteful number, since it uses less digits than its factorization.

2556567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21870 (or 21867 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 2556567 is about 1598.9268275941. The cubic root of 2556567 is about 136.7368989273.

The spelling of 2556567 in words is "two million, five hundred fifty-six thousand, five hundred sixty-seven".