13981212 has 72 divisors (see below), whose sum is σ = 40840800. Its totient is φ = 3950208.

The previous prime is 13981199. The next prime is 13981229. The reversal of 13981212 is 21218931.

13981212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27214 + ... + 27722.

Almost surely, 2^13981212 is an apocalyptic number.

13981212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13981212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20420400).

13981212 is an abundant number, since it is smaller than the sum of its proper divisors (26859588).

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

13981212 is a wasteful number, since it uses less digits than its factorization.

13981212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 630 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 13981212 is about 3739.1458917780. The cubic root of 13981212 is about 240.9063644556.

The spelling of 13981212 in words is "thirteen million, nine hundred eighty-one thousand, two hundred twelve".