257625845 has 24 divisors (see below), whose sum is σ = 332558136. Its totient is φ = 191498112.

The previous prime is 257625799. The next prime is 257625859. The reversal of 257625845 is 548526752.

It can be written as a sum of positive squares in 4 ways, for example, as 37429924 + 220195921 = 6118^2 + 14839^2 .

It is not a de Polignac number, because 257625845 - 2¹⁶ = 257560309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257625796 and 257625805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94319 + ... + 97011.

It is an arithmetic number, because the mean of its divisors is an integer number (13856589).

Almost surely, 2^257625845 is an apocalyptic number.

It is an amenable number.

257625845 is a deficient number, since it is larger than the sum of its proper divisors (74932291).

257625845 is a wasteful number, since it uses less digits than its factorization.

257625845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789 (or 2770 counting only the distinct ones).

The product of its digits is 672000, while the sum is 44.

The square root of 257625845 is about 16050.7272420909. The cubic root of 257625845 is about 636.3017872450.

The spelling of 257625845 in words is "two hundred fifty-seven million, six hundred twenty-five thousand, eight hundred forty-five".