257939425 has 6 divisors (see below), whose sum is σ = 319844918. Its totient is φ = 206351520.

The previous prime is 257939401. The next prime is 257939447. The reversal of 257939425 is 524939752.

It can be written as a sum of positive squares in 3 ways, for example, as 86434209 + 171505216 = 9297^2 + 13096^2 .

It is not a de Polignac number, because 257939425 - 2²¹ = 255842273 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, 5158764 + ... + 5158813.

Almost surely, 2^257939425 is an apocalyptic number.

257939425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

257939425 is a deficient number, since it is larger than the sum of its proper divisors (61905493).

257939425 is a wasteful number, since it uses less digits than its factorization.

257939425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10317587 (or 10317582 counting only the distinct ones).

The product of its digits is 680400, while the sum is 46.

The square root of 257939425 is about 16060.4926761292. The cubic root of 257939425 is about 636.5598496211.

The spelling of 257939425 in words is "two hundred fifty-seven million, nine hundred thirty-nine thousand, four hundred twenty-five".