255958 has 4 divisors (see below), whose sum is σ = 383940. Its totient is φ = 127978.

The previous prime is 255947. The next prime is 255961. The reversal of 255958 is 859552.

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

It is a congruent number.

It is an unprimeable number.

255958 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 63988 + ... + 63991.

It is an arithmetic number, because the mean of its divisors is an integer number (95985).

2²⁵⁵⁹⁵⁸ is an apocalyptic number.

255958 is a deficient number, since it is larger than the sum of its proper divisors (127982).

255958 is a wasteful number, since it uses less digits than its factorization.

255958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127981.

The product of its digits is 18000, while the sum is 34.

The square root of 255958 is about 505.9229190302. The cubic root of 255958 is about 63.4925694490.

The spelling of 255958 in words is "two hundred fifty-five thousand, nine hundred fifty-eight".