2857171 has 4 divisors (see below), whose sum is σ = 2861200. Its totient is φ = 2853144.

The previous prime is 2857159. The next prime is 2857181. The reversal of 2857171 is 1717582.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2857171 is a prime.

It is a super-2 number, since 2×2857171² = 16326852246482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2857181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636 + ... + 2473.

It is an arithmetic number, because the mean of its divisors is an integer number (715300).

2^2857171 is an apocalyptic number.

2857171 is a deficient number, since it is larger than the sum of its proper divisors (4029).

2857171 is an equidigital number, since it uses as much as digits as its factorization.

2857171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028.

The product of its digits is 3920, while the sum is 31.

The square root of 2857171 is about 1690.3168342059. The cubic root of 2857171 is about 141.8988070951.

The spelling of 2857171 in words is "two million, eight hundred fifty-seven thousand, one hundred seventy-one".