257705275 has 6 divisors (see below), whose sum is σ = 319554572. Its totient is φ = 206164200.

The previous prime is 257705251. The next prime is 257705293. The reversal of 257705275 is 572507752.

It is a happy number.

It is not a de Polignac number, because 257705275 - 2⁵ = 257705243 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5154081 + ... + 5154130.

Almost surely, 2^257705275 is an apocalyptic number.

257705275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

257705275 is a deficient number, since it is larger than the sum of its proper divisors (61849297).

257705275 is a wasteful number, since it uses less digits than its factorization.

257705275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10308221 (or 10308216 counting only the distinct ones).

The product of its (nonzero) digits is 171500, while the sum is 40.

The square root of 257705275 is about 16053.2013941145. The cubic root of 257705275 is about 636.3671743928.

The spelling of 257705275 in words is "two hundred fifty-seven million, seven hundred five thousand, two hundred seventy-five".