257461385 has 16 divisors (see below), whose sum is σ = 312508416. Its totient is φ = 203611968.

The previous prime is 257461349. The next prime is 257461387. The reversal of 257461385 is 583164752.

It is a cyclic number.

It is not a de Polignac number, because 257461385 - 2⁸ = 257461129 is a prime.

It is a super-2 number, since 2×257461385² = 132572729532236450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257461387) 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, 236312 + ... + 237398.

It is an arithmetic number, because the mean of its divisors is an integer number (19531776).

Almost surely, 2^257461385 is an apocalyptic number.

It is an amenable number.

257461385 is a deficient number, since it is larger than the sum of its proper divisors (55047031).

257461385 is a wasteful number, since it uses less digits than its factorization.

257461385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592.

The product of its digits is 201600, while the sum is 41.

The square root of 257461385 is about 16045.6032918678. The cubic root of 257461385 is about 636.1663602690.

The spelling of 257461385 in words is "two hundred fifty-seven million, four hundred sixty-one thousand, three hundred eighty-five".