12147147 has 6 divisors (see below), whose sum is σ = 17545892. Its totient is φ = 8098092.

The previous prime is 12147139. The next prime is 12147173. The reversal of 12147147 is 74174121.

12147147 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12147147 - 2³ = 12147139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12147147.

It is not an unprimeable number, because it can be changed into a prime (12147847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 674833 + ... + 674850.

Almost surely, 2^12147147 is an apocalyptic number.

12147147 is a deficient number, since it is larger than the sum of its proper divisors (5398745).

12147147 is a wasteful number, since it uses less digits than its factorization.

12147147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349689 (or 1349686 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 12147147 is about 3485.2757423194. The cubic root of 12147147 is about 229.8748342287.

The spelling of 12147147 in words is "twelve million, one hundred forty-seven thousand, one hundred forty-seven".