864577 has 8 divisors (see below), whose sum is σ = 1022400. Its totient is φ = 715344.

The previous prime is 864551. The next prime is 864581. The reversal of 864577 is 775468.

It is a happy number.

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

It is not a de Polignac number, because 864577 - 2⁷ = 864449 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 (864587) 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, 1927 + ... + 2332.

It is an arithmetic number, because the mean of its divisors is an integer number (127800).

2⁸⁶⁴⁵⁷⁷ is an apocalyptic number.

It is an amenable number.

864577 is a deficient number, since it is larger than the sum of its proper divisors (157823).

864577 is a wasteful number, since it uses less digits than its factorization.

864577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4295.

The product of its digits is 47040, while the sum is 37.

The square root of 864577 is about 929.8263278699. The cubic root of 864577 is about 95.2652604928.

It can be divided in two parts, 864 and 577, that added together give a palindrome (1441).

The spelling of 864577 in words is "eight hundred sixty-four thousand, five hundred seventy-seven".