12156085 has 4 divisors (see below), whose sum is σ = 14587308. Its totient is φ = 9724864.

The previous prime is 12156083. The next prime is 12156101. The reversal of 12156085 is 58065121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2365444 + 9790641 = 1538^2 + 3129^2 .

It is a cyclic number.

It is not a de Polignac number, because 12156085 - 2¹ = 12156083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12156083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215604 + ... + 1215613.

It is an arithmetic number, because the mean of its divisors is an integer number (3646827).

Almost surely, 2^12156085 is an apocalyptic number.

It is an amenable number.

12156085 is a deficient number, since it is larger than the sum of its proper divisors (2431223).

12156085 is an equidigital number, since it uses as much as digits as its factorization.

12156085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431222.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 12156085 is about 3486.5577580186. The cubic root of 12156085 is about 229.9312018553.

The spelling of 12156085 in words is "twelve million, one hundred fifty-six thousand, eighty-five".