2557939 has 12 divisors (see below), whose sum is σ = 2785104. Its totient is φ = 2347904.

The previous prime is 2557937. The next prime is 2557957. The reversal of 2557939 is 9397552.

It is not a de Polignac number, because 2557939 - 2¹ = 2557937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557931) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 15234 + ... + 15400.

It is an arithmetic number, because the mean of its divisors is an integer number (232092).

2^2557939 is an apocalyptic number.

2557939 is a deficient number, since it is larger than the sum of its proper divisors (227165).

2557939 is a wasteful number, since it uses less digits than its factorization.

2557939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 237 counting only the distinct ones).

The product of its digits is 85050, while the sum is 40.

The square root of 2557939 is about 1599.3558078176. The cubic root of 2557939 is about 136.7613548319.

The spelling of 2557939 in words is "two million, five hundred fifty-seven thousand, nine hundred thirty-nine".