257098242 has 64 divisors (see below), whose sum is σ = 558379008. Its totient is φ = 78624000.

The previous prime is 257098217. The next prime is 257098267. The reversal of 257098242 is 242890752.

It is an interprime number because it is at equal distance from previous prime (257098217) and next prime (257098267).

It is a self number, because there is not a number n which added to its sum of digits gives 257098242.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 948567 + ... + 948837.

It is an arithmetic number, because the mean of its divisors is an integer number (8724672).

Almost surely, 2^257098242 is an apocalyptic number.

257098242 is an abundant number, since it is smaller than the sum of its proper divisors (301280766).

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

257098242 is a wasteful number, since it uses less digits than its factorization.

257098242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 257098242 is about 16034.2833329089. The cubic root of 257098242 is about 635.8671204930.

The spelling of 257098242 in words is "two hundred fifty-seven million, ninety-eight thousand, two hundred forty-two".