12771139 has 2 divisors, whose sum is σ = 12771140. Its totient is φ = 12771138.

The previous prime is 12771103. The next prime is 12771149. The reversal of 12771139 is 93117721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12771139 - 2¹³ = 12762947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12771139.

It is not a weakly prime, because it can be changed into another prime (12771149) 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, 6385569 + 6385570.

It is an arithmetic number, because the mean of its divisors is an integer number (6385570).

Almost surely, 2^12771139 is an apocalyptic number.

12771139 is a deficient number, since it is larger than the sum of its proper divisors (1).

12771139 is an equidigital number, since it uses as much as digits as its factorization.

12771139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646, while the sum is 31.

The square root of 12771139 is about 3573.6730404445. The cubic root of 12771139 is about 233.7454740943.

The spelling of 12771139 in words is "twelve million, seven hundred seventy-one thousand, one hundred thirty-nine".