12321247 has 2 divisors, whose sum is σ = 12321248. Its totient is φ = 12321246.

The previous prime is 12321241. The next prime is 12321289. The reversal of 12321247 is 74212321.

It is a weak prime.

It is an emirp because it is prime and its reverse (74212321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12321247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12321241) 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 as a sum of consecutive naturals, namely, 6160623 + 6160624.

It is an arithmetic number, because the mean of its divisors is an integer number (6160624).

Almost surely, 2^12321247 is an apocalyptic number.

12321247 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321247 is an equidigital number, since it uses as much as digits as its factorization.

12321247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 22.

The square root of 12321247 is about 3510.1633865107. The cubic root of 12321247 is about 230.9678621982.

Adding to 12321247 its reverse (74212321), we get a palindrome (86533568).

The spelling of 12321247 in words is "twelve million, three hundred twenty-one thousand, two hundred forty-seven".