12856271 has 2 divisors, whose sum is σ = 12856272. Its totient is φ = 12856270.

The previous prime is 12856253. The next prime is 12856273. The reversal of 12856271 is 17265821.

It is a strong prime.

It is an emirp because it is prime and its reverse (17265821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12856271 is a prime.

Together with 12856273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12856273) 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, 6428135 + 6428136.

It is an arithmetic number, because the mean of its divisors is an integer number (6428136).

Almost surely, 2^12856271 is an apocalyptic number.

12856271 is a deficient number, since it is larger than the sum of its proper divisors (1).

12856271 is an equidigital number, since it uses as much as digits as its factorization.

12856271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 32.

The square root of 12856271 is about 3585.5642512720. The cubic root of 12856271 is about 234.2637042190.

The spelling of 12856271 in words is "twelve million, eight hundred fifty-six thousand, two hundred seventy-one".