285291 has 6 divisors (see below), whose sum is σ = 412100. Its totient is φ = 190188.

The previous prime is 285289. The next prime is 285301. The reversal of 285291 is 192582.

It is not a de Polignac number, because 285291 - 2¹ = 285289 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285291.

It is not an unprimeable number, because it can be changed into a prime (285221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15841 + ... + 15858.

2²⁸⁵²⁹¹ is an apocalyptic number.

285291 is a deficient number, since it is larger than the sum of its proper divisors (126809).

285291 is a wasteful number, since it uses less digits than its factorization.

285291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31705 (or 31702 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 285291 is about 534.1263895372. The cubic root of 285291 is about 65.8308339951.

It can be divided in two parts, 285 and 291, that added together give a square (576 = 24²).

The spelling of 285291 in words is "two hundred eighty-five thousand, two hundred ninety-one".