864285 has 16 divisors (see below), whose sum is σ = 1395456. Its totient is φ = 456768.

The previous prime is 864277. The next prime is 864289. The reversal of 864285 is 582468.

It is not a de Polignac number, because 864285 - 2³ = 864277 is a prime.

It is a super-2 number, since 2×864285² = 1493977122450, which contains 22 as substring.

864285 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864289) 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, 2172 + ... + 2538.

It is an arithmetic number, because the mean of its divisors is an integer number (87216).

2⁸⁶⁴²⁸⁵ is an apocalyptic number.

It is an amenable number.

864285 is a deficient number, since it is larger than the sum of its proper divisors (531171).

864285 is a wasteful number, since it uses less digits than its factorization.

864285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532.

The product of its digits is 15360, while the sum is 33.

The square root of 864285 is about 929.6692960403. The cubic root of 864285 is about 95.2545344043.

It can be divided in two parts, 86 and 4285, that added together give a triangular number (4371 = T₉₃).

The spelling of 864285 in words is "eight hundred sixty-four thousand, two hundred eighty-five".