867867 has 48 divisors (see below), whose sum is σ = 1650432. Its totient is φ = 391680.

The previous prime is 867857. The next prime is 867871. The reversal of 867867 is 768768.

It is not a de Polignac number, because 867867 - 2⁶ = 867803 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867817) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51043 + ... + 51059.

It is an arithmetic number, because the mean of its divisors is an integer number (34384).

2⁸⁶⁷⁸⁶⁷ is an apocalyptic number.

867867 is a deficient number, since it is larger than the sum of its proper divisors (782565).

867867 is a wasteful number, since it uses less digits than its factorization.

867867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 51 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 867867 is about 931.5937955998. The cubic root of 867867 is about 95.3859460946.

Subtracting from 867867 its reverse (768768), we obtain a palindrome (99099).

Multiplying 867867 by its reverse (768768), we get a square (667188377856 = 816816²).

The spelling of 867867 in words is "eight hundred sixty-seven thousand, eight hundred sixty-seven".