12165212 has 6 divisors (see below), whose sum is σ = 21289128. Its totient is φ = 6082604.

The previous prime is 12165199. The next prime is 12165221. The reversal of 12165212 is 21256121.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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, 1520648 + ... + 1520655.

It is an arithmetic number, because the mean of its divisors is an integer number (3548188).

Almost surely, 2^12165212 is an apocalyptic number.

It is an amenable number.

12165212 is a deficient number, since it is larger than the sum of its proper divisors (9123916).

12165212 is a wasteful number, since it uses less digits than its factorization.

12165212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041307 (or 3041305 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 12165212 is about 3487.8663965238. The cubic root of 12165212 is about 229.9887329074.

Subtracting 12165212 from its reverse (21256121), we obtain a palindrome (9090909).

The spelling of 12165212 in words is "twelve million, one hundred sixty-five thousand, two hundred twelve".