12215966 has 16 divisors (see below), whose sum is σ = 21230304. Its totient is φ = 5163264.

The previous prime is 12215947. The next prime is 12215971. The reversal of 12215966 is 66951221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4955 + ... + 6998.

It is an arithmetic number, because the mean of its divisors is an integer number (1326894).

Almost surely, 2^12215966 is an apocalyptic number.

12215966 is a deficient number, since it is larger than the sum of its proper divisors (9014338).

12215966 is a wasteful number, since it uses less digits than its factorization.

12215966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12035.

The product of its digits is 6480, while the sum is 32.

The square root of 12215966 is about 3495.1346182944. The cubic root of 12215966 is about 230.3081314348.

The spelling of 12215966 in words is "twelve million, two hundred fifteen thousand, nine hundred sixty-six".