12115947 has 8 divisors (see below), whose sum is σ = 16675840. Its totient is φ = 7816680.

The previous prime is 12115933. The next prime is 12115949. The reversal of 12115947 is 74951121.

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

It is not a de Polignac number, because 12115947 - 2⁷ = 12115819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12115949) 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, 65047 + ... + 65232.

It is an arithmetic number, because the mean of its divisors is an integer number (2084480).

Almost surely, 2^12115947 is an apocalyptic number.

12115947 is a deficient number, since it is larger than the sum of its proper divisors (4559893).

12115947 is a wasteful number, since it uses less digits than its factorization.

12115947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130313.

The product of its digits is 2520, while the sum is 30.

The square root of 12115947 is about 3480.7968915178. The cubic root of 12115947 is about 229.6778539797.

The spelling of 12115947 in words is "twelve million, one hundred fifteen thousand, nine hundred forty-seven".