12207091 has 4 divisors (see below), whose sum is σ = 13146112. Its totient is φ = 11268072.

The previous prime is 12207079. The next prime is 12207121. The reversal of 12207091 is 19070221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12207091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12207011) 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, 469491 + ... + 469516.

It is an arithmetic number, because the mean of its divisors is an integer number (3286528).

Almost surely, 2^12207091 is an apocalyptic number.

12207091 is a deficient number, since it is larger than the sum of its proper divisors (939021).

12207091 is an equidigital number, since it uses as much as digits as its factorization.

12207091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939020.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 12207091 is about 3493.8647655569. The cubic root of 12207091 is about 230.2523443374.

The spelling of 12207091 in words is "twelve million, two hundred seven thousand, ninety-one".