12391316 has 36 divisors (see below), whose sum is σ = 25433856. Its totient is φ = 5266800.

The previous prime is 12391303. The next prime is 12391321. The reversal of 12391316 is 61319321.

12391316 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 11 ways as a sum of consecutive naturals, for example, 37271 + ... + 37601.

It is an arithmetic number, because the mean of its divisors is an integer number (706496).

Almost surely, 2^12391316 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 12391316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12716928).

12391316 is an abundant number, since it is smaller than the sum of its proper divisors (13042540).

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

12391316 is a wasteful number, since it uses less digits than its factorization.

12391316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 531 counting only the distinct ones).

The product of its digits is 972, while the sum is 26.

The square root of 12391316 is about 3520.1301112317. The cubic root of 12391316 is about 231.4048608684.

The spelling of 12391316 in words is "twelve million, three hundred ninety-one thousand, three hundred sixteen".