255994 has 4 divisors (see below), whose sum is σ = 383994. Its totient is φ = 127996.

The previous prime is 255989. The next prime is 256019. The reversal of 255994 is 499552.

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

It can be written as a sum of positive squares in only one way, i.e., 190969 + 65025 = 437^2 + 255^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63997 + ... + 64000.

2²⁵⁵⁹⁹⁴ is an apocalyptic number.

255994 is a deficient number, since it is larger than the sum of its proper divisors (128000).

255994 is a wasteful number, since it uses less digits than its factorization.

255994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127999.

The product of its digits is 16200, while the sum is 34.

The square root of 255994 is about 505.9584963216. The cubic root of 255994 is about 63.4955460120.

The spelling of 255994 in words is "two hundred fifty-five thousand, nine hundred ninety-four".