12516271 has 2 divisors, whose sum is σ = 12516272. Its totient is φ = 12516270.

The previous prime is 12516263. The next prime is 12516277. The reversal of 12516271 is 17261521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12516271 - 2³ = 12516263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12516277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6258135 + 6258136.

It is an arithmetic number, because the mean of its divisors is an integer number (6258136).

Almost surely, 2^12516271 is an apocalyptic number.

12516271 is a deficient number, since it is larger than the sum of its proper divisors (1).

12516271 is an equidigital number, since it uses as much as digits as its factorization.

12516271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 25.

The square root of 12516271 is about 3537.8342244938. The cubic root of 12516271 is about 232.1800957427.

Adding to 12516271 its reverse (17261521), we get a palindrome (29777792).

The spelling of 12516271 in words is "twelve million, five hundred sixteen thousand, two hundred seventy-one".