12543147 has 8 divisors (see below), whose sum is σ = 18582480. Its totient is φ = 8362080.

The previous prime is 12543131. The next prime is 12543151. The reversal of 12543147 is 74134521.

It is not a de Polignac number, because 12543147 - 2⁴ = 12543131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 464561 = 12543147 / (1 + 2 + 5 + 4 + 3 + 1 + 4 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 12543147.

It is not an unprimeable number, because it can be changed into a prime (12543107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232254 + ... + 232307.

It is an arithmetic number, because the mean of its divisors is an integer number (2322810).

Almost surely, 2^12543147 is an apocalyptic number.

12543147 is a deficient number, since it is larger than the sum of its proper divisors (6039333).

12543147 is an equidigital number, since it uses as much as digits as its factorization.

12543147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464570 (or 464564 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 12543147 is about 3541.6305566787. The cubic root of 12543147 is about 232.3461625414.

Adding to 12543147 its reverse (74134521), we get a palindrome (86677668).

The spelling of 12543147 in words is "twelve million, five hundred forty-three thousand, one hundred forty-seven".