860086521 has 24 divisors (see below), whose sum is σ = 1425092864. Its totient is φ = 489654720.

The previous prime is 860086501. The next prime is 860086523. The reversal of 860086521 is 125680068.

It is a happy number.

It is not a de Polignac number, because 860086521 - 2⁵ = 860086489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (860086523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8116 + ... + 42261.

Almost surely, 2^860086521 is an apocalyptic number.

It is an amenable number.

860086521 is a deficient number, since it is larger than the sum of its proper divisors (565006343).

860086521 is a wasteful number, since it uses less digits than its factorization.

860086521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50661 (or 50658 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 860086521 is about 29327.2317309357. The cubic root of 860086521 is about 951.0004312244. Note that the first 3 decimals are identical.

It can be divided in two parts, 86008 and 6521, that added together give a palindrome (92529).

The spelling of 860086521 in words is "eight hundred sixty million, eighty-six thousand, five hundred twenty-one".