257175427 has 2 divisors, whose sum is σ = 257175428. Its totient is φ = 257175426.

The previous prime is 257175407. The next prime is 257175433. The reversal of 257175427 is 724571752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257175427 - 2²⁷ = 122957699 is a prime.

It is a super-2 number, since 2×257175427² = 132278400505264658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257175427.

It is not a weakly prime, because it can be changed into another prime (257175407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128587713 + 128587714.

It is an arithmetic number, because the mean of its divisors is an integer number (128587714).

Almost surely, 2^257175427 is an apocalyptic number.

257175427 is a deficient number, since it is larger than the sum of its proper divisors (1).

257175427 is an equidigital number, since it uses as much as digits as its factorization.

257175427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137200, while the sum is 40.

The square root of 257175427 is about 16036.6900263115. The cubic root of 257175427 is about 635.9307466160.

The spelling of 257175427 in words is "two hundred fifty-seven million, one hundred seventy-five thousand, four hundred twenty-seven".