12085581 has 8 divisors (see below), whose sum is σ = 16148160. Its totient is φ = 8040032.

The previous prime is 12085561. The next prime is 12085597. The reversal of 12085581 is 18558021.

12085581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12085581 - 2⁶ = 12085517 is a prime.

It is a super-2 number, since 2×12085581² = 292122536215122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12085531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2496 + ... + 5513.

It is an arithmetic number, because the mean of its divisors is an integer number (2018520).

Almost surely, 2^12085581 is an apocalyptic number.

It is an amenable number.

12085581 is a deficient number, since it is larger than the sum of its proper divisors (4062579).

12085581 is an equidigital number, since it uses as much as digits as its factorization.

12085581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8515.

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 12085581 is about 3476.4322228400. The cubic root of 12085581 is about 229.4858141706.

The spelling of 12085581 in words is "twelve million, eighty-five thousand, five hundred eighty-one".