12771271 has 2 divisors, whose sum is σ = 12771272. Its totient is φ = 12771270.

The previous prime is 12771221. The next prime is 12771307. The reversal of 12771271 is 17217721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12771271 - 2²¹ = 10674119 is a prime.

It is equal to p₈₃₅₃₃₆ and since 12771271 and 835336 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12771221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6385635 + 6385636.

It is an arithmetic number, because the mean of its divisors is an integer number (6385636).

Almost surely, 2^12771271 is an apocalyptic number.

12771271 is a deficient number, since it is larger than the sum of its proper divisors (1).

12771271 is an equidigital number, since it uses as much as digits as its factorization.

12771271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1372, while the sum is 28.

The square root of 12771271 is about 3573.6915087903. The cubic root of 12771271 is about 233.7462794074.

Adding to 12771271 its reverse (17217721), we get a palindrome (29988992).

The spelling of 12771271 in words is "twelve million, seven hundred seventy-one thousand, two hundred seventy-one".