864971 has 4 divisors (see below), whose sum is σ = 876000. Its totient is φ = 853944.

The previous prime is 864967. The next prime is 864979. The reversal of 864971 is 179468.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 864971 - 2² = 864967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5396 + ... + 5553.

It is an arithmetic number, because the mean of its divisors is an integer number (219000).

2⁸⁶⁴⁹⁷¹ is an apocalyptic number.

864971 is a deficient number, since it is larger than the sum of its proper divisors (11029).

864971 is a wasteful number, since it uses less digits than its factorization.

864971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11028.

The product of its digits is 12096, while the sum is 35.

The square root of 864971 is about 930.0381712597. The cubic root of 864971 is about 95.2797295386.

The spelling of 864971 in words is "eight hundred sixty-four thousand, nine hundred seventy-one".