12516015 has 16 divisors (see below), whose sum is σ = 20088288. Its totient is φ = 6654336.

The previous prime is 12516013. The next prime is 12516017. The reversal of 12516015 is 51061521.

It is an interprime number because it is at equal distance from previous prime (12516013) and next prime (12516017).

It is not a de Polignac number, because 12516015 - 2¹ = 12516013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12515982 and 12516000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12516011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4477 + ... + 6713.

It is an arithmetic number, because the mean of its divisors is an integer number (1255518).

Almost surely, 2^12516015 is an apocalyptic number.

12516015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12516015 is a deficient number, since it is larger than the sum of its proper divisors (7572273).

12516015 is a wasteful number, since it uses less digits than its factorization.

12516015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 12516015 is about 3537.7980439816. The cubic root of 12516015 is about 232.1785127763.

Adding to 12516015 its reverse (51061521), we get a palindrome (63577536).

The spelling of 12516015 in words is "twelve million, five hundred sixteen thousand, fifteen".