12987212 has 12 divisors (see below), whose sum is σ = 25974480. Its totient is φ = 5565936.

The previous prime is 12987199. The next prime is 12987217. The reversal of 12987212 is 21278921.

It is a happy number.

12987212 is an admirable number.

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

It is not an unprimeable number, because it can be changed into a prime (12987217) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 231887 + ... + 231942.

It is an arithmetic number, because the mean of its divisors is an integer number (2164540).

Almost surely, 2^12987212 is an apocalyptic number.

It is an amenable number.

12987212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12987212 is a wasteful number, since it uses less digits than its factorization.

12987212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463840 (or 463838 counting only the distinct ones).

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

The square root of 12987212 is about 3603.7774626078. Note that the first 3 decimals coincide. The cubic root of 12987212 is about 235.0563438160.

The spelling of 12987212 in words is "twelve million, nine hundred eighty-seven thousand, two hundred twelve".