12516009 has 8 divisors (see below), whose sum is σ = 18205152. Its totient is φ = 7585440.

The previous prime is 12515999. The next prime is 12516011. The reversal of 12516009 is 90061521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12516009 - 2⁸ = 12515753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12516009.

It is not an unprimeable number, because it can be changed into a prime (12516059) 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, 189604 + ... + 189669.

It is an arithmetic number, because the mean of its divisors is an integer number (2275644).

Almost surely, 2^12516009 is an apocalyptic number.

It is an amenable number.

12516009 is a deficient number, since it is larger than the sum of its proper divisors (5689143).

12516009 is a wasteful number, since it uses less digits than its factorization.

12516009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379287.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 12516009 is about 3537.7971959964. The cubic root of 12516009 is about 232.1784756752.

It can be divided in two parts, 1251 and 6009, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 12516009 in words is "twelve million, five hundred sixteen thousand, nine".