12771431 has 2 divisors, whose sum is σ = 12771432. Its totient is φ = 12771430.

The previous prime is 12771419. The next prime is 12771457. The reversal of 12771431 is 13417721.

It is a happy number.

It is an a-pointer prime, because the next prime (12771457) can be obtained adding 12771431 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12771431 is a prime.

It is a super-2 number, since 2×12771431² = 326218899575522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p₈₃₅₃₄₃ and since 12771431 and 835343 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12771431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12771461) 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, 6385715 + 6385716.

It is an arithmetic number, because the mean of its divisors is an integer number (6385716).

Almost surely, 2^12771431 is an apocalyptic number.

12771431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12771431 is an equidigital number, since it uses as much as digits as its factorization.

12771431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1176, while the sum is 26.

The square root of 12771431 is about 3573.7138945360. The cubic root of 12771431 is about 233.7472555370.

The spelling of 12771431 in words is "twelve million, seven hundred seventy-one thousand, four hundred thirty-one".