868005 has 12 divisors (see below), whose sum is σ = 1504620. Its totient is φ = 462912.

The previous prime is 867991. The next prime is 868019. The reversal of 868005 is 500868.

It is an interprime number because it is at equal distance from previous prime (867991) and next prime (868019).

It can be written as a sum of positive squares in 2 ways, for example, as 459684 + 408321 = 678^2 + 639^2 .

It is not a de Polignac number, because 868005 - 2¹¹ = 865957 is a prime.

868005 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 868005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9600 + ... + 9689.

It is an arithmetic number, because the mean of its divisors is an integer number (125385).

2⁸⁶⁸⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

868005 is a deficient number, since it is larger than the sum of its proper divisors (636615).

868005 is a wasteful number, since it uses less digits than its factorization.

868005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19300 (or 19297 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 868005 is about 931.6678592717. The cubic root of 868005 is about 95.3910016169.

The spelling of 868005 in words is "eight hundred sixty-eight thousand, five".