257525785 has 16 divisors (see below), whose sum is σ = 340607232. Its totient is φ = 185356800.

The previous prime is 257525783. The next prime is 257525803. The reversal of 257525785 is 587525752.

It is not a de Polignac number, because 257525785 - 2¹ = 257525783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257525783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18801 + ... + 29470.

It is an arithmetic number, because the mean of its divisors is an integer number (21287952).

Almost surely, 2^257525785 is an apocalyptic number.

It is an amenable number.

257525785 is a deficient number, since it is larger than the sum of its proper divisors (83081447).

257525785 is a wasteful number, since it uses less digits than its factorization.

257525785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48384.

The product of its digits is 980000, while the sum is 46.

The square root of 257525785 is about 16047.6099466556. The cubic root of 257525785 is about 636.2193982526.

The spelling of 257525785 in words is "two hundred fifty-seven million, five hundred twenty-five thousand, seven hundred eighty-five".