257522 has 4 divisors (see below), whose sum is σ = 386286. Its totient is φ = 128760.

The previous prime is 257519. The next prime is 257539. The reversal of 257522 is 225752.

257522 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 160801 + 96721 = 401^2 + 311^2 .

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 as a sum of consecutive naturals, namely, 64379 + ... + 64382.

2²⁵⁷⁵²² is an apocalyptic number.

257522 is a deficient number, since it is larger than the sum of its proper divisors (128764).

257522 is a wasteful number, since it uses less digits than its factorization.

257522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128763.

The product of its digits is 1400, while the sum is 23.

The square root of 257522 is about 507.4662550357. The cubic root of 257522 is about 63.6216281280.

The spelling of 257522 in words is "two hundred fifty-seven thousand, five hundred twenty-two".