12817212 has 12 divisors (see below), whose sum is σ = 29906856. Its totient is φ = 4272400.

The previous prime is 12817177. The next prime is 12817213. The reversal of 12817212 is 21271821.

12817212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12817213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534039 + ... + 534062.

It is an arithmetic number, because the mean of its divisors is an integer number (2492238).

Almost surely, 2^12817212 is an apocalyptic number.

12817212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12817212 is an abundant number, since it is smaller than the sum of its proper divisors (17089644).

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

12817212 is a wasteful number, since it uses less digits than its factorization.

12817212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068108 (or 1068106 counting only the distinct ones).

The product of its digits is 448, while the sum is 24.

The square root of 12817212 is about 3580.1134060250. The cubic root of 12817212 is about 234.0262224978.

The spelling of 12817212 in words is "twelve million, eight hundred seventeen thousand, two hundred twelve".