257171 has 2 divisors, whose sum is σ = 257172. Its totient is φ = 257170.

The previous prime is 257161. The next prime is 257177. The reversal of 257171 is 171752.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257171 - 2⁶ = 257107 is a prime.

It is a super-2 number, since 2×257171² = 132273846482, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128585 + 128586.

It is an arithmetic number, because the mean of its divisors is an integer number (128586).

2²⁵⁷¹⁷¹ is an apocalyptic number.

257171 is a deficient number, since it is larger than the sum of its proper divisors (1).

257171 is an equidigital number, since it uses as much as digits as its factorization.

257171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 490, while the sum is 23.

The square root of 257171 is about 507.1203013093. The cubic root of 257171 is about 63.5927097639.

The spelling of 257171 in words is "two hundred fifty-seven thousand, one hundred seventy-one".