12009615 has 16 divisors (see below), whose sum is σ = 20227200. Its totient is φ = 6067872.

The previous prime is 12009593. The next prime is 12009623. The reversal of 12009615 is 51690021.

12009615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12009615 - 2⁵ = 12009583 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20785 + ... + 21354.

It is an arithmetic number, because the mean of its divisors is an integer number (1264200).

Almost surely, 2^12009615 is an apocalyptic number.

12009615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12009615 is a deficient number, since it is larger than the sum of its proper divisors (8217585).

12009615 is a wasteful number, since it uses less digits than its factorization.

12009615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42166.

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

The square root of 12009615 is about 3465.4891429638. The cubic root of 12009615 is about 229.0039790058.

Adding to 12009615 its reverse (51690021), we get a palindrome (63699636).

The spelling of 12009615 in words is "twelve million, nine thousand, six hundred fifteen".