8521863 has 16 divisors (see below), whose sum is σ = 13044480. Its totient is φ = 4847616.

The previous prime is 8521841. The next prime is 8521867. The reversal of 8521863 is 3681258.

It is a happy number.

8521863 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8521863 - 2⁵ = 8521831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8521867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4608 + ... + 6186.

It is an arithmetic number, because the mean of its divisors is an integer number (815280).

Almost surely, 2^8521863 is an apocalyptic number.

8521863 is a deficient number, since it is larger than the sum of its proper divisors (4522617).

8521863 is a wasteful number, since it uses less digits than its factorization.

8521863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846.

The product of its digits is 11520, while the sum is 33.

The square root of 8521863 is about 2919.2230130636. The cubic root of 8521863 is about 204.2575802431.

The spelling of 8521863 in words is "eight million, five hundred twenty-one thousand, eight hundred sixty-three".