257674842 has 36 divisors (see below), whose sum is σ = 583646154. Its totient is φ = 82154160.

The previous prime is 257674841. The next prime is 257674861. The reversal of 257674842 is 248476752.

It is a happy number.

257674842 is a `hidden beast` number, since 2 + 576 + 74 + 8 + 4 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 249671601 + 8003241 = 15801^2 + 2829^2 .

It is not an unprimeable number, because it can be changed into a prime (257674841) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4009 + ... + 23052.

Almost surely, 2^257674842 is an apocalyptic number.

257674842 is an abundant number, since it is smaller than the sum of its proper divisors (325971312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257674842 is a wasteful number, since it uses less digits than its factorization.

257674842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27115 (or 27089 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The square root of 257674842 is about 16052.2534866604. The cubic root of 257674842 is about 636.3421233927.

The spelling of 257674842 in words is "two hundred fifty-seven million, six hundred seventy-four thousand, eight hundred forty-two".