13987212 has 24 divisors (see below), whose sum is σ = 33397056. Its totient is φ = 4553808.

The previous prime is 13987139. The next prime is 13987217. The reversal of 13987212 is 21278931.

It is not an unprimeable number, because it can be changed into a prime (13987217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13038 + ... + 14069.

It is an arithmetic number, because the mean of its divisors is an integer number (1391544).

Almost surely, 2^13987212 is an apocalyptic number.

13987212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13987212 is an abundant number, since it is smaller than the sum of its proper divisors (19409844).

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

13987212 is a wasteful number, since it uses less digits than its factorization.

13987212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27157 (or 27155 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 13987212 is about 3739.9481279825. The cubic root of 13987212 is about 240.9408209693.

The spelling of 13987212 in words is "thirteen million, nine hundred eighty-seven thousand, two hundred twelve".