257651125 has 8 divisors (see below), whose sum is σ = 321548760. Its totient is φ = 206120800.

The previous prime is 257651111. The next prime is 257651161. The reversal of 257651125 is 521156752.

It can be written as a sum of positive squares in 4 ways, for example, as 69906321 + 187744804 = 8361^2 + 13702^2 .

It is a de Polignac number, because none of the positive numbers 2^k-257651125 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1030480 + ... + 1030729.

It is an arithmetic number, because the mean of its divisors is an integer number (40193595).

Almost surely, 2^257651125 is an apocalyptic number.

257651125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

257651125 is a deficient number, since it is larger than the sum of its proper divisors (63897635).

257651125 is an equidigital number, since it uses as much as digits as its factorization.

257651125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061224 (or 2061214 counting only the distinct ones).

The product of its digits is 21000, while the sum is 34.

The square root of 257651125 is about 16051.5147260313. The cubic root of 257651125 is about 636.3225993172.

The spelling of 257651125 in words is "two hundred fifty-seven million, six hundred fifty-one thousand, one hundred twenty-five".