8422564 has 6 divisors (see below), whose sum is σ = 14739494. Its totient is φ = 4211280.

The previous prime is 8422559. The next prime is 8422571. The reversal of 8422564 is 4652248.

It can be written as a sum of positive squares in only one way, i.e., 8294400 + 128164 = 2880^2 + 358^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052817 + ... + 1052824.

Almost surely, 2^8422564 is an apocalyptic number.

It is an amenable number.

8422564 is a deficient number, since it is larger than the sum of its proper divisors (6316930).

8422564 is a wasteful number, since it uses less digits than its factorization.

8422564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105645 (or 2105643 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The square root of 8422564 is about 2902.1653984568. The cubic root of 8422564 is about 203.4611242438.

The spelling of 8422564 in words is "eight million, four hundred twenty-two thousand, five hundred sixty-four".