257472565 has 16 divisors (see below), whose sum is σ = 373876992. Its totient is φ = 166166784.

The previous prime is 257472547. The next prime is 257472581. The reversal of 257472565 is 565274752.

257472565 = 338² + 339² + ... + 932².

It is not a de Polignac number, because 257472565 - 2¹³ = 257464373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215769 + ... + 216958.

It is an arithmetic number, because the mean of its divisors is an integer number (23367312).

Almost surely, 2^257472565 is an apocalyptic number.

It is an amenable number.

257472565 is a deficient number, since it is larger than the sum of its proper divisors (116404427).

257472565 is a wasteful number, since it uses less digits than its factorization.

257472565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432756.

The product of its digits is 588000, while the sum is 43.

The square root of 257472565 is about 16045.9516701254. The cubic root of 257472565 is about 636.1755684291.

The spelling of 257472565 in words is "two hundred fifty-seven million, four hundred seventy-two thousand, five hundred sixty-five".