12615216 has 40 divisors (see below), whose sum is σ = 32966640. Its totient is φ = 4156416.

The previous prime is 12615199. The next prime is 12615257. The reversal of 12615216 is 61251621.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2796 + ... + 5748.

It is an arithmetic number, because the mean of its divisors is an integer number (824166).

Almost surely, 2^12615216 is an apocalyptic number.

12615216 is a gapful number since it is divisible by the number (16) 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 12615216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16483320).

12615216 is an abundant number, since it is smaller than the sum of its proper divisors (20351424).

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

12615216 is a wasteful number, since it uses less digits than its factorization.

12615216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053 (or 3047 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 12615216 is about 3551.7905343643. The cubic root of 12615216 is about 232.7903091111.

Adding to 12615216 its reverse (61251621), we get a palindrome (73866837).

The spelling of 12615216 in words is "twelve million, six hundred fifteen thousand, two hundred sixteen".