12085521 has 32 divisors (see below), whose sum is σ = 19756800. Its totient is φ = 6414336.

The previous prime is 12085519. The next prime is 12085523. The reversal of 12085521 is 12558021.

It is an interprime number because it is at equal distance from previous prime (12085519) and next prime (12085523).

It is not a de Polignac number, because 12085521 - 2¹ = 12085519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12085491 and 12085500.

It is not an unprimeable number, because it can be changed into a prime (12085523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34455 + ... + 34803.

It is an arithmetic number, because the mean of its divisors is an integer number (617400).

Almost surely, 2^12085521 is an apocalyptic number.

It is an amenable number.

12085521 is a deficient number, since it is larger than the sum of its proper divisors (7671279).

12085521 is a wasteful number, since it uses less digits than its factorization.

12085521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 12085521 is about 3476.4235932924. The cubic root of 12085521 is about 229.4854344020.

The spelling of 12085521 in words is "twelve million, eighty-five thousand, five hundred twenty-one".