2857 has 2 divisors, whose sum is σ = 2858. Its totient is φ = 2856.

The previous prime is 2851. The next prime is 2861. The reversal of 2857 is 7582.

2857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2601 + 256 = 51^2 + 16^2 .

It is a cyclic number.

It is not a de Polignac number, because 2857 - 2⁷ = 2729 is a prime.

It is a Chen prime.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (2851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428 + 1429.

It is an arithmetic number, because the mean of its divisors is an integer number (1429).

2²⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

2857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2857 is an equidigital number, since it uses as much as digits as its factorization.

2857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 22.

The square root of 2857 is about 53.4509120596. The cubic root of 2857 is about 14.1895976185.

It can be divided in two parts, 285 and 7, that added together give a palindrome (292).

The spelling of 2857 in words is "two thousand, eight hundred fifty-seven".