12031091 has 8 divisors (see below), whose sum is σ = 12332544. Its totient is φ = 11733120.

The previous prime is 12031079. The next prime is 12031111. The reversal of 12031091 is 19013021.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12031091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12031051) 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, 6971 + ... + 8523.

It is an arithmetic number, because the mean of its divisors is an integer number (1541568).

Almost surely, 2^12031091 is an apocalyptic number.

12031091 is a deficient number, since it is larger than the sum of its proper divisors (301453).

12031091 is a wasteful number, since it uses less digits than its factorization.

12031091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 12031091 is about 3468.5863114531. The cubic root of 12031091 is about 229.1404019413.

The spelling of 12031091 in words is "twelve million, thirty-one thousand, ninety-one".