864451 has 4 divisors (see below), whose sum is σ = 987952. Its totient is φ = 740952.

The previous prime is 864449. The next prime is 864491. The reversal of 864451 is 154468.

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 864451 - 2¹ = 864449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61740 + ... + 61753.

It is an arithmetic number, because the mean of its divisors is an integer number (246988).

2⁸⁶⁴⁴⁵¹ is an apocalyptic number.

864451 is a deficient number, since it is larger than the sum of its proper divisors (123501).

864451 is a wasteful number, since it uses less digits than its factorization.

864451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123500.

The product of its digits is 3840, while the sum is 28.

The square root of 864451 is about 929.7585708129. The cubic root of 864451 is about 95.2606324084.

The spelling of 864451 in words is "eight hundred sixty-four thousand, four hundred fifty-one".