285065 has 16 divisors (see below), whose sum is σ = 383616. Its totient is φ = 201600.

The previous prime is 285049. The next prime is 285071. The reversal of 285065 is 560582.

It is not a de Polignac number, because 285065 - 2⁴ = 285049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3869 + ... + 3941.

It is an arithmetic number, because the mean of its divisors is an integer number (23976).

2²⁸⁵⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

285065 is a deficient number, since it is larger than the sum of its proper divisors (98551).

285065 is a wasteful number, since it uses less digits than its factorization.

285065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 285065 is about 533.9147872086. The cubic root of 285065 is about 65.8134462532.

The spelling of 285065 in words is "two hundred eighty-five thousand, sixty-five".