8521636 has 12 divisors (see below), whose sum is σ = 14937328. Its totient is φ = 4253832.

The previous prime is 8521631. The next prime is 8521649. The reversal of 8521636 is 6361258.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 8521598 and 8521607.

It is not an unprimeable number, because it can be changed into a prime (8521631) 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, 1795 + ... + 4501.

Almost surely, 2^8521636 is an apocalyptic number.

It is an amenable number.

8521636 is a deficient number, since it is larger than the sum of its proper divisors (6415692).

8521636 is a wasteful number, since it uses less digits than its factorization.

8521636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3498 (or 3496 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 8521636 is about 2919.1841325960. The cubic root of 8521636 is about 204.2557665989.

The spelling of 8521636 in words is "eight million, five hundred twenty-one thousand, six hundred thirty-six".