12391076 has 6 divisors (see below), whose sum is σ = 21684390. Its totient is φ = 6195536.

The previous prime is 12391073. The next prime is 12391081. The reversal of 12391076 is 67019321.

It can be written as a sum of positive squares in only one way, i.e., 12390400 + 676 = 3520^2 + 26^2 .

It is not an unprimeable number, because it can be changed into a prime (12391073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1548881 + ... + 1548888.

It is an arithmetic number, because the mean of its divisors is an integer number (3614065).

Almost surely, 2^12391076 is an apocalyptic number.

It is an amenable number.

12391076 is a deficient number, since it is larger than the sum of its proper divisors (9293314).

12391076 is a wasteful number, since it uses less digits than its factorization.

12391076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3097773 (or 3097771 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 12391076 is about 3520.0960214176. The cubic root of 12391076 is about 231.4033668779.

The spelling of 12391076 in words is "twelve million, three hundred ninety-one thousand, seventy-six".