12771749 has 2 divisors, whose sum is σ = 12771750. Its totient is φ = 12771748.

The previous prime is 12771727. The next prime is 12771757. The reversal of 12771749 is 94717721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7059649 + 5712100 = 2657^2 + 2390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12771749 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 (12771719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6385874 + 6385875.

It is an arithmetic number, because the mean of its divisors is an integer number (6385875).

Almost surely, 2^12771749 is an apocalyptic number.

It is an amenable number.

12771749 is a deficient number, since it is larger than the sum of its proper divisors (1).

12771749 is an equidigital number, since it uses as much as digits as its factorization.

12771749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 38.

The square root of 12771749 is about 3573.7583857894. The cubic root of 12771749 is about 233.7491955705.

The spelling of 12771749 in words is "twelve million, seven hundred seventy-one thousand, seven hundred forty-nine".