12317312 has 64 divisors (see below), whose sum is σ = 28641600. Its totient is φ = 5167104.

The previous prime is 12317311. The next prime is 12317317. The reversal of 12317312 is 21371321.

12317312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (12317311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52748 + ... + 52980.

It is an arithmetic number, because the mean of its divisors is an integer number (447525).

Almost surely, 2^12317312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12317312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14320800).

12317312 is an abundant number, since it is smaller than the sum of its proper divisors (16324288).

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

12317312 is an equidigital number, since it uses as much as digits as its factorization.

12317312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 301 counting only the distinct ones).

The product of its digits is 252, while the sum is 20.

The square root of 12317312 is about 3509.6028265318. The cubic root of 12317312 is about 230.9432717405.

Adding to 12317312 its reverse (21371321), we get a palindrome (33688633).

The spelling of 12317312 in words is "twelve million, three hundred seventeen thousand, three hundred twelve".