12891516 has 48 divisors (see below), whose sum is σ = 33116160. Its totient is φ = 3870720.

The previous prime is 12891509. The next prime is 12891517. The reversal of 12891516 is 61519821.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12891517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16380 + ... + 17148.

It is an arithmetic number, because the mean of its divisors is an integer number (689920).

Almost surely, 2^12891516 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 12891516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16558080).

12891516 is an abundant number, since it is smaller than the sum of its proper divisors (20224644).

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

12891516 is a wasteful number, since it uses less digits than its factorization.

12891516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 912 counting only the distinct ones).

The product of its digits is 4320, while the sum is 33.

The square root of 12891516 is about 3590.4757344954. The cubic root of 12891516 is about 234.4775840355.

The spelling of 12891516 in words is "twelve million, eight hundred ninety-one thousand, five hundred sixteen".