2557857 has 8 divisors (see below), whose sum is σ = 3417984. Its totient is φ = 1701488.

The previous prime is 2557843. The next prime is 2557861. The reversal of 2557857 is 7587552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2557857 - 2⁷ = 2557729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2557817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1768 + ... + 2870.

It is an arithmetic number, because the mean of its divisors is an integer number (427248).

2^2557857 is an apocalyptic number.

It is an amenable number.

2557857 is a deficient number, since it is larger than the sum of its proper divisors (860127).

2557857 is a wasteful number, since it uses less digits than its factorization.

2557857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879.

The product of its digits is 98000, while the sum is 39.

The square root of 2557857 is about 1599.3301722909. The cubic root of 2557857 is about 136.7598934273.

The spelling of 2557857 in words is "two million, five hundred fifty-seven thousand, eight hundred fifty-seven".