257552725 has 12 divisors (see below), whose sum is σ = 319706596. Its totient is φ = 205822080.

The previous prime is 257552723. The next prime is 257552767. The reversal of 257552725 is 527255752.

It can be written as a sum of positive squares in 6 ways, for example, as 848241 + 256704484 = 921^2 + 16022^2 .

It is not a de Polignac number, because 257552725 - 2¹ = 257552723 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257552723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20839 + ... + 30811.

Almost surely, 2^257552725 is an apocalyptic number.

257552725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

257552725 is a deficient number, since it is larger than the sum of its proper divisors (62153871).

257552725 is a wasteful number, since it uses less digits than its factorization.

257552725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11016 (or 11011 counting only the distinct ones).

The product of its digits is 245000, while the sum is 40.

The square root of 257552725 is about 16048.4493020354. The cubic root of 257552725 is about 636.2415826369.

The spelling of 257552725 in words is "two hundred fifty-seven million, five hundred fifty-two thousand, seven hundred twenty-five".