868585 has 16 divisors (see below), whose sum is σ = 1128960. Its totient is φ = 639360.

The previous prime is 868583. The next prime is 868603. The reversal of 868585 is 585868.

868585 = T₁₈₅ + T₁₈₆ + ... + T₂₂₅.

It is not a de Polignac number, because 868585 - 2¹ = 868583 is a prime.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (868583) 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, 3784 + ... + 4006.

It is an arithmetic number, because the mean of its divisors is an integer number (70560).

2⁸⁶⁸⁵⁸⁵ is an apocalyptic number.

It is an amenable number.

868585 is a deficient number, since it is larger than the sum of its proper divisors (260375).

868585 is a wasteful number, since it uses less digits than its factorization.

868585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288.

The product of its digits is 76800, while the sum is 40.

The square root of 868585 is about 931.9790770184. The cubic root of 868585 is about 95.4122436076.

The spelling of 868585 in words is "eight hundred sixty-eight thousand, five hundred eighty-five".