12564147 has 8 divisors (see below), whose sum is σ = 16768720. Its totient is φ = 8367840.

The previous prime is 12564143. The next prime is 12564151. The reversal of 12564147 is 74146521.

It is an interprime number because it is at equal distance from previous prime (12564143) and next prime (12564151).

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

It is not a de Polignac number, because 12564147 - 2² = 12564143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12564143) 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, 4197 + ... + 6537.

It is an arithmetic number, because the mean of its divisors is an integer number (2096090).

Almost surely, 2^12564147 is an apocalyptic number.

12564147 is a deficient number, since it is larger than the sum of its proper divisors (4204573).

12564147 is a wasteful number, since it uses less digits than its factorization.

12564147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4133.

The product of its digits is 6720, while the sum is 30.

The square root of 12564147 is about 3544.5940529206. The cubic root of 12564147 is about 232.4757565194.

The spelling of 12564147 in words is "twelve million, five hundred sixty-four thousand, one hundred forty-seven".