12515328 has 144 divisors (see below), whose sum is σ = 41736240. Its totient is φ = 3538944.

The previous prime is 12515323. The next prime is 12515329. The reversal of 12515328 is 82351521.

It is a happy number.

12515328 is a `hidden beast` number, since 125 + 1 + 532 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128976 + ... + 129072.

It is an arithmetic number, because the mean of its divisors is an integer number (289835).

Almost surely, 2^12515328 is an apocalyptic number.

12515328 is a gapful number since it is divisible by the number (18) 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 12515328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20868120).

12515328 is an abundant number, since it is smaller than the sum of its proper divisors (29220912).

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

12515328 is an equidigital number, since it uses as much as digits as its factorization.

12515328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 109 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 12515328 is about 3537.7009483561. The cubic root of 12515328 is about 232.1742646308.

Adding to 12515328 its reverse (82351521), we get a palindrome (94866849).

The spelling of 12515328 in words is "twelve million, five hundred fifteen thousand, three hundred twenty-eight".