2257857 has 12 divisors (see below), whose sum is σ = 3727360. Its totient is φ = 1290168.

The previous prime is 2257837. The next prime is 2257859. The reversal of 2257857 is 7587522.

It is not a de Polignac number, because 2257857 - 2¹⁸ = 1995713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2257859) 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, 17857 + ... + 17982.

2^2257857 is an apocalyptic number.

It is an amenable number.

2257857 is a deficient number, since it is larger than the sum of its proper divisors (1469503).

2257857 is a wasteful number, since it uses less digits than its factorization.

2257857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35852 (or 35849 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 2257857 is about 1502.6167175963. The cubic root of 2257857 is about 131.1894196616.

The spelling of 2257857 in words is "two million, two hundred fifty-seven thousand, eight hundred fifty-seven".