255905 has 16 divisors (see below), whose sum is σ = 344064. Its totient is φ = 181440.

The previous prime is 255887. The next prime is 255907. The reversal of 255905 is 509552.

It is not a de Polignac number, because 255905 - 2⁶ = 255841 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 3.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 255905.

It is not an unprimeable number, because it can be changed into a prime (255907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1952 + ... + 2078.

It is an arithmetic number, because the mean of its divisors is an integer number (21504).

2²⁵⁵⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

255905 is a deficient number, since it is larger than the sum of its proper divisors (88159).

255905 is a wasteful number, since it uses less digits than its factorization.

255905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 255905 is about 505.8705367977. The cubic root of 255905 is about 63.4881867788.

The spelling of 255905 in words is "two hundred fifty-five thousand, nine hundred five".