12243147 has 8 divisors (see below), whose sum is σ = 18656256. Its totient is φ = 6996072.

The previous prime is 12243139. The next prime is 12243151. The reversal of 12243147 is 74134221.

It is a happy number.

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

It is not a de Polignac number, because 12243147 - 2³ = 12243139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12243157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291483 + ... + 291524.

It is an arithmetic number, because the mean of its divisors is an integer number (2332032).

Almost surely, 2^12243147 is an apocalyptic number.

12243147 is a deficient number, since it is larger than the sum of its proper divisors (6413109).

12243147 is an equidigital number, since it uses as much as digits as its factorization.

12243147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583017.

The product of its digits is 1344, while the sum is 24.

The square root of 12243147 is about 3499.0208630415. The cubic root of 12243147 is about 230.4788197546.

Adding to 12243147 its reverse (74134221), we get a palindrome (86377368).

It can be divided in two parts, 1224 and 3147, that added together give a triangular number (4371 = T₉₃).

The spelling of 12243147 in words is "twelve million, two hundred forty-three thousand, one hundred forty-seven".