12767281 has 2 divisors, whose sum is σ = 12767282. Its totient is φ = 12767280.

The previous prime is 12767273. The next prime is 12767299. The reversal of 12767281 is 18276721.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8503056 + 4264225 = 2916^2 + 2065^2 .

It is an emirp because it is prime and its reverse (18276721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12767281 - 2³ = 12767273 is a prime.

It is a super-3 number, since 3×12767281³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (12767681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6383640 + 6383641.

It is an arithmetic number, because the mean of its divisors is an integer number (6383641).

Almost surely, 2^12767281 is an apocalyptic number.

It is an amenable number.

12767281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12767281 is an equidigital number, since it uses as much as digits as its factorization.

12767281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 34.

The square root of 12767281 is about 3573.1332188991. The cubic root of 12767281 is about 233.7219345373.

The spelling of 12767281 in words is "twelve million, seven hundred sixty-seven thousand, two hundred eighty-one".