257525071 has 2 divisors, whose sum is σ = 257525072. Its totient is φ = 257525070.

The previous prime is 257525041. The next prime is 257525077. The reversal of 257525071 is 170525752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257525071 - 2²⁷ = 123307343 is a prime.

It is a super-3 number, since 3×257525071³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257525077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128762535 + 128762536.

It is an arithmetic number, because the mean of its divisors is an integer number (128762536).

Almost surely, 2^257525071 is an apocalyptic number.

257525071 is a deficient number, since it is larger than the sum of its proper divisors (1).

257525071 is an equidigital number, since it uses as much as digits as its factorization.

257525071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24500, while the sum is 34.

The square root of 257525071 is about 16047.5877003368. The cubic root of 257525071 is about 636.2188102712.

The spelling of 257525071 in words is "two hundred fifty-seven million, five hundred twenty-five thousand, seventy-one".