12165616 has 40 divisors (see below), whose sum is σ = 24685920. Its totient is φ = 5800704.

The previous prime is 12165613. The next prime is 12165619. The reversal of 12165616 is 61656121.

12165616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12165613) and next prime (12165619).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12165613) 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, 72765 + ... + 72931.

It is an arithmetic number, because the mean of its divisors is an integer number (617148).

Almost surely, 2^12165616 is an apocalyptic number.

12165616 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 12165616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12342960).

12165616 is an abundant number, since it is smaller than the sum of its proper divisors (12520304).

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

12165616 is a wasteful number, since it uses less digits than its factorization.

12165616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 355 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 12165616 is about 3487.9243111054. The cubic root of 12165616 is about 229.9912788123.

The spelling of 12165616 in words is "twelve million, one hundred sixty-five thousand, six hundred sixteen".