12505271 has 2 divisors, whose sum is σ = 12505272. Its totient is φ = 12505270.

The previous prime is 12505267. The next prime is 12505291. The reversal of 12505271 is 17250521.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (17250521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12505271 - 2² = 12505267 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12505231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6252635 + 6252636.

It is an arithmetic number, because the mean of its divisors is an integer number (6252636).

Almost surely, 2^12505271 is an apocalyptic number.

12505271 is a deficient number, since it is larger than the sum of its proper divisors (1).

12505271 is an equidigital number, since it uses as much as digits as its factorization.

12505271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 12505271 is about 3536.2792593346. The cubic root of 12505271 is about 232.1120581828.

Adding to 12505271 its reverse (17250521), we get a palindrome (29755792).

The spelling of 12505271 in words is "twelve million, five hundred five thousand, two hundred seventy-one".