257542 has 8 divisors (see below), whose sum is σ = 392832. Its totient is φ = 126600.

The previous prime is 257539. The next prime is 257561. The reversal of 257542 is 245752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 934 + ... + 1177.

It is an arithmetic number, because the mean of its divisors is an integer number (49104).

2²⁵⁷⁵⁴² is an apocalyptic number.

257542 is a deficient number, since it is larger than the sum of its proper divisors (135290).

257542 is a wasteful number, since it uses less digits than its factorization.

257542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174.

The product of its digits is 2800, while the sum is 25.

The square root of 257542 is about 507.4859603969. The cubic root of 257542 is about 63.6232751066.

The spelling of 257542 in words is "two hundred fifty-seven thousand, five hundred forty-two".