12247091 has 4 divisors (see below), whose sum is σ = 12271032. Its totient is φ = 12223152.

The previous prime is 12247087. The next prime is 12247093. The reversal of 12247091 is 19074221.

12247091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12247091 - 2² = 12247087 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 12247091.

It is not an unprimeable number, because it can be changed into a prime (12247093) 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, 11186 + ... + 12231.

It is an arithmetic number, because the mean of its divisors is an integer number (3067758).

Almost surely, 2^12247091 is an apocalyptic number.

12247091 is a deficient number, since it is larger than the sum of its proper divisors (23941).

12247091 is an equidigital number, since it uses as much as digits as its factorization.

12247091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23940.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 12247091 is about 3499.5844038971. The cubic root of 12247091 is about 230.5035658669.

The spelling of 12247091 in words is "twelve million, two hundred forty-seven thousand, ninety-one".