257453425 has 6 divisors (see below), whose sum is σ = 319242278. Its totient is φ = 205962720.

The previous prime is 257453381. The next prime is 257453431. The reversal of 257453425 is 524354752.

It can be written as a sum of positive squares in 3 ways, for example, as 13593969 + 243859456 = 3687^2 + 15616^2 .

It is not a de Polignac number, because 257453425 - 2⁷ = 257453297 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, 5149044 + ... + 5149093.

Almost surely, 2^257453425 is an apocalyptic number.

257453425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

257453425 is a deficient number, since it is larger than the sum of its proper divisors (61788853).

257453425 is a wasteful number, since it uses less digits than its factorization.

257453425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10298147 (or 10298142 counting only the distinct ones).

The product of its digits is 168000, while the sum is 37.

The square root of 257453425 is about 16045.3552469243. The cubic root of 257453425 is about 636.1598040283.

The spelling of 257453425 in words is "two hundred fifty-seven million, four hundred fifty-three thousand, four hundred twenty-five".