257255 has 8 divisors (see below), whose sum is σ = 322272. Its totient is φ = 196768.

The previous prime is 257249. The next prime is 257263. The reversal of 257255 is 552752.

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 257255 - 2⁴ = 257239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 257255.

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 in 7 ways as a sum of consecutive naturals, for example, 1004 + ... + 1233.

It is an arithmetic number, because the mean of its divisors is an integer number (40284).

2²⁵⁷²⁵⁵ is an apocalyptic number.

257255 is a deficient number, since it is larger than the sum of its proper divisors (65017).

257255 is a wasteful number, since it uses less digits than its factorization.

257255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2265.

The product of its digits is 3500, while the sum is 26.

The square root of 257255 is about 507.2031151324. The cubic root of 257255 is about 63.5996327919.

It can be divided in two parts, 257 and 255, that added together give a 9-th power (512 = 2⁹).

The spelling of 257255 in words is "two hundred fifty-seven thousand, two hundred fifty-five".