864249 has 8 divisors (see below), whose sum is σ = 1189632. Its totient is φ = 557520.

The previous prime is 864223. The next prime is 864251. The reversal of 864249 is 942468.

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

It is not a de Polignac number, because 864249 - 2⁷ = 864121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864289) 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, 4554 + ... + 4739.

It is an arithmetic number, because the mean of its divisors is an integer number (148704).

2⁸⁶⁴²⁴⁹ is an apocalyptic number.

It is an amenable number.

864249 is a deficient number, since it is larger than the sum of its proper divisors (325383).

864249 is a wasteful number, since it uses less digits than its factorization.

864249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9327.

The product of its digits is 13824, while the sum is 33.

The square root of 864249 is about 929.6499341150. The cubic root of 864249 is about 95.2532118426.

The spelling of 864249 in words is "eight hundred sixty-four thousand, two hundred forty-nine".