868205 has 24 divisors (see below), whose sum is σ = 1216152. Its totient is φ = 590976.

The previous prime is 868199. The next prime is 868211. The reversal of 868205 is 502868.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (868199) and next prime (868211).

It can be written as a sum of positive squares in 4 ways, for example, as 104329 + 763876 = 323^2 + 874^2 .

It is not a de Polignac number, because 868205 - 2¹⁴ = 851821 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23447 + ... + 23483.

It is an arithmetic number, because the mean of its divisors is an integer number (50673).

2⁸⁶⁸²⁰⁵ is an apocalyptic number.

It is an amenable number.

868205 is a deficient number, since it is larger than the sum of its proper divisors (347947).

868205 is a wasteful number, since it uses less digits than its factorization.

868205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 868205 is about 931.7751874782. The cubic root of 868205 is about 95.3983275099.

The spelling of 868205 in words is "eight hundred sixty-eight thousand, two hundred five".