12312912 has 80 divisors (see below), whose sum is σ = 34997760. Its totient is φ = 3712896.

The previous prime is 12312901. The next prime is 12312917. The reversal of 12312912 is 21921321.

12312912 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20683 + ... + 21269.

It is an arithmetic number, because the mean of its divisors is an integer number (437472).

Almost surely, 2^12312912 is an apocalyptic number.

12312912 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 12312912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17498880).

12312912 is an abundant number, since it is smaller than the sum of its proper divisors (22684848).

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

12312912 is a wasteful number, since it uses less digits than its factorization.

12312912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 634 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

The square root of 12312912 is about 3508.9759189826. The cubic root of 12312912 is about 230.9157692190.

The spelling of 12312912 in words is "twelve million, three hundred twelve thousand, nine hundred twelve".