864522 has 12 divisors (see below), whose sum is σ = 1873170. Its totient is φ = 288168.

The previous prime is 864511. The next prime is 864533. The reversal of 864522 is 225468.

It is an interprime number because it is at equal distance from previous prime (864511) and next prime (864533).

It can be written as a sum of positive squares in only one way, i.e., 741321 + 123201 = 861^2 + 351^2 .

It is an unprimeable number.

864522 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23997 + ... + 24032.

2⁸⁶⁴⁵²² is an apocalyptic number.

864522 is an abundant number, since it is smaller than the sum of its proper divisors (1008648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864522 is a wasteful number, since it uses less digits than its factorization.

864522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48037 (or 48034 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 864522 is about 929.7967519840. The cubic root of 864522 is about 95.2632403526.

The spelling of 864522 in words is "eight hundred sixty-four thousand, five hundred twenty-two".