864651 has 8 divisors (see below), whose sum is σ = 1157184. Its totient is φ = 574280.

The previous prime is 864641. The next prime is 864673. The reversal of 864651 is 156468.

864651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 864651 - 2⁶ = 864587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864631) 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, 1180 + ... + 1766.

It is an arithmetic number, because the mean of its divisors is an integer number (144648).

2⁸⁶⁴⁶⁵¹ is an apocalyptic number.

864651 is a deficient number, since it is larger than the sum of its proper divisors (292533).

864651 is a wasteful number, since it uses less digits than its factorization.

864651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081.

The product of its digits is 5760, while the sum is 30.

The square root of 864651 is about 929.8661193957. The cubic root of 864651 is about 95.2679783646.

The spelling of 864651 in words is "eight hundred sixty-four thousand, six hundred fifty-one".