12991412 has 24 divisors (see below), whose sum is σ = 27113856. Its totient is φ = 5325408.

The previous prime is 12991397. The next prime is 12991423. The reversal of 12991412 is 21419921.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9443 + ... + 10730.

It is an arithmetic number, because the mean of its divisors is an integer number (1129744).

Almost surely, 2^12991412 is an apocalyptic number.

It is an amenable number.

12991412 is an abundant number, since it is smaller than the sum of its proper divisors (14122444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12991412 is a wasteful number, since it uses less digits than its factorization.

12991412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20207 (or 20205 counting only the distinct ones).

The product of its digits is 1296, while the sum is 29.

The square root of 12991412 is about 3604.3601373892. The cubic root of 12991412 is about 235.0816797706.

The spelling of 12991412 in words is "twelve million, nine hundred ninety-one thousand, four hundred twelve".