257170925 has 12 divisors (see below), whose sum is σ = 347882496. Its totient is φ = 187033200.

The previous prime is 257170913. The next prime is 257170939. The reversal of 257170925 is 529071752.

It is not a de Polignac number, because 257170925 - 2²⁴ = 240393709 is a prime.

It is a super-2 number, since 2×257170925² = 132273769330711250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 467309 + ... + 467858.

It is an arithmetic number, because the mean of its divisors is an integer number (28990208).

Almost surely, 2^257170925 is an apocalyptic number.

257170925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

257170925 is a deficient number, since it is larger than the sum of its proper divisors (90711571).

257170925 is a wasteful number, since it uses less digits than its factorization.

257170925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935188 (or 935183 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 257170925 is about 16036.5496600734. The cubic root of 257170925 is about 635.9270358196.

The spelling of 257170925 in words is "two hundred fifty-seven million, one hundred seventy thousand, nine hundred twenty-five".