864881 has 8 divisors (see below), whose sum is σ = 894240. Its totient is φ = 836128.

The previous prime is 864817. The next prime is 864883. The reversal of 864881 is 188468.

864881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 864881 - 2⁶ = 864817 is a prime.

It is a super-2 number, since 2×864881² = 1496038288322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6245 + ... + 6381.

It is an arithmetic number, because the mean of its divisors is an integer number (111780).

2⁸⁶⁴⁸⁸¹ is an apocalyptic number.

It is an amenable number.

864881 is a deficient number, since it is larger than the sum of its proper divisors (29359).

864881 is a wasteful number, since it uses less digits than its factorization.

864881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303.

The product of its digits is 12288, while the sum is 35.

The square root of 864881 is about 929.9897848901. The cubic root of 864881 is about 95.2764248139.

The spelling of 864881 in words is "eight hundred sixty-four thousand, eight hundred eighty-one".