12013947 has 32 divisors (see below), whose sum is σ = 20448000. Its totient is φ = 6894720.

The previous prime is 12013931. The next prime is 12013949. The reversal of 12013947 is 74931021.

It is not a de Polignac number, because 12013947 - 2⁴ = 12013931 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12013947.

It is not an unprimeable number, because it can be changed into a prime (12013949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4579 + ... + 6707.

It is an arithmetic number, because the mean of its divisors is an integer number (639000).

Almost surely, 2^12013947 is an apocalyptic number.

12013947 is a deficient number, since it is larger than the sum of its proper divisors (8434053).

12013947 is a wasteful number, since it uses less digits than its factorization.

12013947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168 (or 2162 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 12013947 is about 3466.1141066041. The cubic root of 12013947 is about 229.0315104456.

Adding to 12013947 its reverse (74931021), we get a palindrome (86944968).

The spelling of 12013947 in words is "twelve million, thirteen thousand, nine hundred forty-seven".