257865325 has 6 divisors (see below), whose sum is σ = 319753034. Its totient is φ = 206292240.

The previous prime is 257865271. The next prime is 257865329. The reversal of 257865325 is 523568752.

It can be written as a sum of positive squares in 3 ways, for example, as 1929321 + 255936004 = 1389^2 + 15998^2 .

It is not a de Polignac number, because 257865325 - 2⁹ = 257864813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257865329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5157282 + ... + 5157331.

Almost surely, 2^257865325 is an apocalyptic number.

257865325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

257865325 is a deficient number, since it is larger than the sum of its proper divisors (61887709).

257865325 is a wasteful number, since it uses less digits than its factorization.

257865325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10314623 (or 10314618 counting only the distinct ones).

The product of its digits is 504000, while the sum is 43.

The square root of 257865325 is about 16058.1856073468. The cubic root of 257865325 is about 636.4988875013.

The spelling of 257865325 in words is "two hundred fifty-seven million, eight hundred sixty-five thousand, three hundred twenty-five".