257967285 has 16 divisors (see below), whose sum is σ = 422815680. Its totient is φ = 134226560.

The previous prime is 257967257. The next prime is 257967373. The reversal of 257967285 is 582769752.

It is not a de Polignac number, because 257967285 - 2⁵ = 257967253 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 209115 + ... + 210344.

It is an arithmetic number, because the mean of its divisors is an integer number (26425980).

Almost surely, 2^257967285 is an apocalyptic number.

It is an amenable number.

257967285 is a deficient number, since it is larger than the sum of its proper divisors (164848395).

257967285 is a wasteful number, since it uses less digits than its factorization.

257967285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419508.

The product of its digits is 2116800, while the sum is 51.

The square root of 257967285 is about 16061.3599984559. The cubic root of 257967285 is about 636.5827670418.

The spelling of 257967285 in words is "two hundred fifty-seven million, nine hundred sixty-seven thousand, two hundred eighty-five".