257279 has 8 divisors (see below), whose sum is σ = 295680. Its totient is φ = 221400.

The previous prime is 257273. The next prime is 257281. The reversal of 257279 is 972752.

257279 is nontrivially palindromic in base 6.

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

It is a cyclic number.

It is not a de Polignac number, because 257279 - 2⁴ = 257263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257273) 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, 407 + ... + 824.

It is an arithmetic number, because the mean of its divisors is an integer number (36960).

2²⁵⁷²⁷⁹ is an apocalyptic number.

257279 is a deficient number, since it is larger than the sum of its proper divisors (38401).

257279 is a wasteful number, since it uses less digits than its factorization.

257279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261.

The product of its digits is 8820, while the sum is 32.

The square root of 257279 is about 507.2267737413. The cubic root of 257279 is about 63.6016105231.

The spelling of 257279 in words is "two hundred fifty-seven thousand, two hundred seventy-nine".