257079 has 8 divisors (see below), whose sum is σ = 348160. Its totient is φ = 168696.

The previous prime is 257077. The next prime is 257093. The reversal of 257079 is 970752.

It is a happy number.

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

It is not a de Polignac number, because 257079 - 2¹ = 257077 is a prime.

It is a super-2 number, since 2×257079² = 132179224482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439 + ... + 840.

It is an arithmetic number, because the mean of its divisors is an integer number (43520).

2²⁵⁷⁰⁷⁹ is an apocalyptic number.

257079 is a deficient number, since it is larger than the sum of its proper divisors (91081).

257079 is a wasteful number, since it uses less digits than its factorization.

257079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349.

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 257079 is about 507.0295849356. The cubic root of 257079 is about 63.5851256699.

Subtracting from 257079 its sum of digits (30), we obtain a square (257049 = 507²).

The spelling of 257079 in words is "two hundred fifty-seven thousand, seventy-nine".