13121966 has 48 divisors (see below), whose sum is σ = 24086832. Its totient is φ = 5322240.

The previous prime is 13121921. The next prime is 13121971. The reversal of 13121966 is 66912131.

13121966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135230 + ... + 135326.

It is an arithmetic number, because the mean of its divisors is an integer number (501809).

Almost surely, 2^13121966 is an apocalyptic number.

13121966 is a deficient number, since it is larger than the sum of its proper divisors (10964866).

13121966 is a wasteful number, since it uses less digits than its factorization.

13121966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 166 counting only the distinct ones).

The product of its digits is 1944, while the sum is 29.

The square root of 13121966 is about 3622.4254305644. The cubic root of 13121966 is about 235.8665217630.

The spelling of 13121966 in words is "thirteen million, one hundred twenty-one thousand, nine hundred sixty-six".