864457 has 8 divisors (see below), whose sum is σ = 954720. Its totient is φ = 776160.

The previous prime is 864449. The next prime is 864491. The reversal of 864457 is 754468.

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

It is not a de Polignac number, because 864457 - 2³ = 864449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864407) 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, 538 + ... + 1420.

It is an arithmetic number, because the mean of its divisors is an integer number (119340).

2⁸⁶⁴⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

864457 is a deficient number, since it is larger than the sum of its proper divisors (90263).

864457 is a wasteful number, since it uses less digits than its factorization.

864457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983.

The product of its digits is 26880, while the sum is 34.

The square root of 864457 is about 929.7617974514. The cubic root of 864457 is about 95.2608528036.

The spelling of 864457 in words is "eight hundred sixty-four thousand, four hundred fifty-seven".