12445247 has 4 divisors (see below), whose sum is σ = 13100280. Its totient is φ = 11790216.

The previous prime is 12445187. The next prime is 12445249. The reversal of 12445247 is 74254421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12445247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12445249) 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 3 ways as a sum of consecutive naturals, for example, 327488 + ... + 327525.

It is an arithmetic number, because the mean of its divisors is an integer number (3275070).

Almost surely, 2^12445247 is an apocalyptic number.

12445247 is a deficient number, since it is larger than the sum of its proper divisors (655033).

12445247 is an equidigital number, since it uses as much as digits as its factorization.

12445247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655032.

The product of its digits is 8960, while the sum is 29.

The square root of 12445247 is about 3527.7821644767. The cubic root of 12445247 is about 231.7400911672.

Adding to 12445247 its reverse (74254421), we get a palindrome (86699668).

The spelling of 12445247 in words is "twelve million, four hundred forty-five thousand, two hundred forty-seven".