12085091 has 4 divisors (see below), whose sum is σ = 12093432. Its totient is φ = 12076752.

The previous prime is 12085033. The next prime is 12085103. The reversal of 12085091 is 19058021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12085091 - 2²² = 7890787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12085091.

It is not an unprimeable number, because it can be changed into a prime (12085001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1370 + ... + 5103.

It is an arithmetic number, because the mean of its divisors is an integer number (3023358).

Almost surely, 2^12085091 is an apocalyptic number.

12085091 is a deficient number, since it is larger than the sum of its proper divisors (8341).

12085091 is an equidigital number, since it uses as much as digits as its factorization.

12085091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8340.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 12085091 is about 3476.3617475746. The cubic root of 12085091 is about 229.4827126904.

The spelling of 12085091 in words is "twelve million, eighty-five thousand, ninety-one".