12391066 has 16 divisors (see below), whose sum is σ = 19522944. Its totient is φ = 5887024.

The previous prime is 12391039. The next prime is 12391069. The reversal of 12391066 is 66019321.

12391066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12391069) 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, 6876 + ... + 8488.

It is an arithmetic number, because the mean of its divisors is an integer number (1220184).

Almost surely, 2^12391066 is an apocalyptic number.

12391066 is a deficient number, since it is larger than the sum of its proper divisors (7131878).

12391066 is a wasteful number, since it uses less digits than its factorization.

12391066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 12391066 is about 3520.0946010015. The cubic root of 12391066 is about 231.4033046279.

The spelling of 12391066 in words is "twelve million, three hundred ninety-one thousand, sixty-six".