864507 has 12 divisors (see below), whose sum is σ = 1341096. Its totient is φ = 493920.

The previous prime is 864503. The next prime is 864509. The reversal of 864507 is 705468.

It is a happy number.

864507 is nontrivially palindromic in base 5.

It is not a de Polignac number, because 864507 - 2² = 864503 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 864507.

It is not an unprimeable number, because it can be changed into a prime (864503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2794 + ... + 3087.

It is an arithmetic number, because the mean of its divisors is an integer number (111758).

2⁸⁶⁴⁵⁰⁷ is an apocalyptic number.

864507 is a deficient number, since it is larger than the sum of its proper divisors (476589).

864507 is a wasteful number, since it uses less digits than its factorization.

864507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5898 (or 5891 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 864507 is about 929.7886856700. The cubic root of 864507 is about 95.2626893904.

The spelling of 864507 in words is "eight hundred sixty-four thousand, five hundred seven".