12016509 has 8 divisors (see below), whose sum is σ = 16091712. Its totient is φ = 7976160.

The previous prime is 12016507. The next prime is 12016541. The reversal of 12016509 is 90561021.

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

It is not a de Polignac number, because 12016509 - 2¹ = 12016507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12016507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7897 + ... + 9294.

It is an arithmetic number, because the mean of its divisors is an integer number (2011464).

Almost surely, 2^12016509 is an apocalyptic number.

It is an amenable number.

12016509 is a deficient number, since it is larger than the sum of its proper divisors (4075203).

12016509 is a wasteful number, since it uses less digits than its factorization.

12016509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17427.

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

The square root of 12016509 is about 3466.4836650416. The cubic root of 12016509 is about 229.0477897757.

The spelling of 12016509 in words is "twelve million, sixteen thousand, five hundred nine".