12781271 has 2 divisors, whose sum is σ = 12781272. Its totient is φ = 12781270.

The previous prime is 12781267. The next prime is 12781291. The reversal of 12781271 is 17218721.

12781271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12781271 - 2² = 12781267 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 (12781291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6390635 + 6390636.

It is an arithmetic number, because the mean of its divisors is an integer number (6390636).

Almost surely, 2^12781271 is an apocalyptic number.

12781271 is a deficient number, since it is larger than the sum of its proper divisors (1).

12781271 is an equidigital number, since it uses as much as digits as its factorization.

12781271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1568, while the sum is 29.

The square root of 12781271 is about 3575.0903485087. The cubic root of 12781271 is about 233.8072718483.

Adding to 12781271 its reverse (17218721), we get a palindrome (29999992).

The spelling of 12781271 in words is "twelve million, seven hundred eighty-one thousand, two hundred seventy-one".