11997812 has 12 divisors (see below), whose sum is σ = 21909216. Its totient is φ = 5738040.

The previous prime is 11997787. The next prime is 11997829. The reversal of 11997812 is 21879911.

11997812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65114 + ... + 65297.

It is an arithmetic number, because the mean of its divisors is an integer number (1825768).

Almost surely, 2^11997812 is an apocalyptic number.

It is an amenable number.

11997812 is a deficient number, since it is larger than the sum of its proper divisors (9911404).

11997812 is a wasteful number, since it uses less digits than its factorization.

11997812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130438 (or 130436 counting only the distinct ones).

The product of its digits is 9072, while the sum is 38.

The square root of 11997812 is about 3463.7857901435. The cubic root of 11997812 is about 228.9289330273.

The spelling of 11997812 in words is "eleven million, nine hundred ninety-seven thousand, eight hundred twelve".