257671251 has 6 divisors (see below), whose sum is σ = 372191820. Its totient is φ = 171780828.

The previous prime is 257671243. The next prime is 257671273. The reversal of 257671251 is 152176752.

It is not a de Polignac number, because 257671251 - 2³ = 257671243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257671241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14315061 + ... + 14315078.

It is an arithmetic number, because the mean of its divisors is an integer number (62031970).

Almost surely, 2^257671251 is an apocalyptic number.

257671251 is a deficient number, since it is larger than the sum of its proper divisors (114520569).

257671251 is a wasteful number, since it uses less digits than its factorization.

257671251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28630145 (or 28630142 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 257671251 is about 16052.1416328165. The cubic root of 257671251 is about 636.3391673220.

The spelling of 257671251 in words is "two hundred fifty-seven million, six hundred seventy-one thousand, two hundred fifty-one".