12516247 has 2 divisors, whose sum is σ = 12516248. Its totient is φ = 12516246.

The previous prime is 12516227. The next prime is 12516253. The reversal of 12516247 is 74261521.

12516247 is nontrivially palindromic in base 11.

It is a strong prime.

It is an emirp because it is prime and its reverse (74261521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12516247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12516227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6258123 + 6258124.

It is an arithmetic number, because the mean of its divisors is an integer number (6258124).

Almost surely, 2^12516247 is an apocalyptic number.

12516247 is a deficient number, since it is larger than the sum of its proper divisors (1).

12516247 is an equidigital number, since it uses as much as digits as its factorization.

12516247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 28.

The square root of 12516247 is about 3537.8308325865. The cubic root of 12516247 is about 232.1799473405.

Adding to 12516247 its reverse (74261521), we get a palindrome (86777768).

The spelling of 12516247 in words is "twelve million, five hundred sixteen thousand, two hundred forty-seven".