12312664 has 48 divisors (see below), whose sum is σ = 28591920. Its totient is φ = 4867200.

The previous prime is 12312661. The next prime is 12312683. The reversal of 12312664 is 46621321.

12312664 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 not an unprimeable number, because it can be changed into a prime (12312661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8814 + ... + 10114.

It is an arithmetic number, because the mean of its divisors is an integer number (595665).

Almost surely, 2^12312664 is an apocalyptic number.

12312664 is a gapful number since it is divisible by the number (14) 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 12312664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14295960).

12312664 is an abundant number, since it is smaller than the sum of its proper divisors (16279256).

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

12312664 is a wasteful number, since it uses less digits than its factorization.

12312664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340 (or 1323 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 12312664 is about 3508.9405808591. The cubic root of 12312664 is about 230.9142188818.

Adding to 12312664 its reverse (46621321), we get a palindrome (58933985).

The spelling of 12312664 in words is "twelve million, three hundred twelve thousand, six hundred sixty-four".