285315 has 16 divisors (see below), whose sum is σ = 476928. Its totient is φ = 145376.

The previous prime is 285301. The next prime is 285317. The reversal of 285315 is 513582.

It is a cyclic number.

It is not a de Polignac number, because 285315 - 2⁵ = 285283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285317) 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, 69 + ... + 758.

It is an arithmetic number, because the mean of its divisors is an integer number (29808).

2²⁸⁵³¹⁵ is an apocalyptic number.

285315 is a deficient number, since it is larger than the sum of its proper divisors (191613).

285315 is a wasteful number, since it uses less digits than its factorization.

285315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858.

The product of its digits is 1200, while the sum is 24.

The square root of 285315 is about 534.1488556573. The cubic root of 285315 is about 65.8326799415.

Adding to 285315 its reverse (513582), we get a palindrome (798897).

The spelling of 285315 in words is "two hundred eighty-five thousand, three hundred fifteen".