2557506 has 24 divisors (see below), whose sum is σ = 5950800. Its totient is φ = 730632.

The previous prime is 2557501. The next prime is 2557507. The reversal of 2557506 is 6057552.

It is not an unprimeable number, because it can be changed into a prime (2557501) 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, 4056 + ... + 4643.

It is an arithmetic number, because the mean of its divisors is an integer number (247950).

2^2557506 is an apocalyptic number.

2557506 is an abundant number, since it is smaller than the sum of its proper divisors (3393294).

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

2557506 is a wasteful number, since it uses less digits than its factorization.

2557506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8718 (or 8711 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 2557506 is about 1599.2204350870. The cubic root of 2557506 is about 136.7536375501.

The spelling of 2557506 in words is "two million, five hundred fifty-seven thousand, five hundred six".