257490955 has 16 divisors (see below), whose sum is σ = 318306240. Its totient is φ = 199815552.

The previous prime is 257490949. The next prime is 257490979. The reversal of 257490955 is 559094752.

It is a cyclic number.

It is not a de Polignac number, because 257490955 - 2¹³ = 257482763 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64477 + ... + 68353.

It is an arithmetic number, because the mean of its divisors is an integer number (19894140).

Almost surely, 2^257490955 is an apocalyptic number.

257490955 is a deficient number, since it is larger than the sum of its proper divisors (60815285).

257490955 is a wasteful number, since it uses less digits than its factorization.

257490955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4278.

The product of its (nonzero) digits is 567000, while the sum is 46.

The square root of 257490955 is about 16046.5247016293. The cubic root of 257490955 is about 636.1907143666.

The spelling of 257490955 in words is "two hundred fifty-seven million, four hundred ninety thousand, nine hundred fifty-five".