2056857 has 16 divisors (see below), whose sum is σ = 3018432. Its totient is φ = 1235520.

The previous prime is 2056853. The next prime is 2056891. The reversal of 2056857 is 7586502.

It is a happy number.

It is not a de Polignac number, because 2056857 - 2² = 2056853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁹ + 0 + 5⁷ + 6⁵ + 8³ + 5⁹ + 7⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4983 + ... + 5379.

It is an arithmetic number, because the mean of its divisors is an integer number (188652).

2^2056857 is an apocalyptic number.

It is an amenable number.

2056857 is a deficient number, since it is larger than the sum of its proper divisors (961575).

2056857 is a wasteful number, since it uses less digits than its factorization.

2056857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 2056857 is about 1434.1746755539. The cubic root of 2056857 is about 127.1748887378.

The spelling of 2056857 in words is "two million, fifty-six thousand, eight hundred fifty-seven".