285263 has 4 divisors (see below), whose sum is σ = 311208. Its totient is φ = 259320.

The previous prime is 285251. The next prime is 285281. The reversal of 285263 is 362582.

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 285263 - 2⁶ = 285199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285283) 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, 12956 + ... + 12977.

It is an arithmetic number, because the mean of its divisors is an integer number (77802).

2²⁸⁵²⁶³ is an apocalyptic number.

285263 is a deficient number, since it is larger than the sum of its proper divisors (25945).

285263 is a wasteful number, since it uses less digits than its factorization.

285263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25944.

The product of its digits is 2880, while the sum is 26.

The square root of 285263 is about 534.1001778693. The cubic root of 285263 is about 65.8286802601.

The spelling of 285263 in words is "two hundred eighty-five thousand, two hundred sixty-three".