285255 has 16 divisors (see below), whose sum is σ = 507360. Its totient is φ = 152064.

The previous prime is 285251. The next prime is 285281. The reversal of 285255 is 552582.

It is not a de Polignac number, because 285255 - 2² = 285251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 285255.

It is not an unprimeable number, because it can be changed into a prime (285251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 922 + ... + 1191.

It is an arithmetic number, because the mean of its divisors is an integer number (31710).

2²⁸⁵²⁵⁵ is an apocalyptic number.

285255 is a deficient number, since it is larger than the sum of its proper divisors (222105).

285255 is a wasteful number, since it uses less digits than its factorization.

285255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127 (or 2121 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 285255 is about 534.0926885850. The cubic root of 285255 is about 65.8280648813.

The spelling of 285255 in words is "two hundred eighty-five thousand, two hundred fifty-five".