285259 has 4 divisors (see below), whose sum is σ = 307216. Its totient is φ = 263304.

The previous prime is 285251. The next prime is 285281. The reversal of 285259 is 952582.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 285259 - 2³ = 285251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285259.

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 3 ways as a sum of consecutive naturals, for example, 10959 + ... + 10984.

It is an arithmetic number, because the mean of its divisors is an integer number (76804).

2²⁸⁵²⁵⁹ is an apocalyptic number.

285259 is a deficient number, since it is larger than the sum of its proper divisors (21957).

285259 is a wasteful number, since it uses less digits than its factorization.

285259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21956.

The product of its digits is 7200, while the sum is 31.

The square root of 285259 is about 534.0964332403. The cubic root of 285259 is about 65.8283725721.

The spelling of 285259 in words is "two hundred eighty-five thousand, two hundred fifty-nine".