8520564 has 48 divisors (see below), whose sum is σ = 21597632. Its totient is φ = 2598912.

The previous prime is 8520527. The next prime is 8520571. The reversal of 8520564 is 4650258.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29967 + ... + 30249.

Almost surely, 2^8520564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8520564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10798816).

8520564 is an abundant number, since it is smaller than the sum of its proper divisors (13077068).

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

8520564 is a wasteful number, since it uses less digits than its factorization.

8520564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 8520564 is about 2919.0005138746. Note that the first 3 decimals coincide. The cubic root of 8520564 is about 204.2472012888.

The spelling of 8520564 in words is "eight million, five hundred twenty thousand, five hundred sixty-four".