12978212 has 48 divisors (see below), whose sum is σ = 25815552. Its totient is φ = 5667840.

The previous prime is 12978211. The next prime is 12978227. The reversal of 12978212 is 21287921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12978211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133748 + ... + 133844.

It is an arithmetic number, because the mean of its divisors is an integer number (537824).

Almost surely, 2^12978212 is an apocalyptic number.

It is an amenable number.

12978212 is a deficient number, since it is larger than the sum of its proper divisors (12837340).

12978212 is a wasteful number, since it uses less digits than its factorization.

12978212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 226 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 12978212 is about 3602.5285564448. The cubic root of 12978212 is about 235.0020340853.

The spelling of 12978212 in words is "twelve million, nine hundred seventy-eight thousand, two hundred twelve".