864751 has 4 divisors (see below), whose sum is σ = 894600. Its totient is φ = 834904.

The previous prime is 864737. The next prime is 864757. The reversal of 864751 is 157468.

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 864751 - 2⁷ = 864623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14881 + ... + 14938.

It is an arithmetic number, because the mean of its divisors is an integer number (223650).

2⁸⁶⁴⁷⁵¹ is an apocalyptic number.

864751 is a deficient number, since it is larger than the sum of its proper divisors (29849).

864751 is a wasteful number, since it uses less digits than its factorization.

864751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29848.

The product of its digits is 6720, while the sum is 31.

The square root of 864751 is about 929.9198890227. The cubic root of 864751 is about 95.2716509178.

The spelling of 864751 in words is "eight hundred sixty-four thousand, seven hundred fifty-one".