12760721 has 2 divisors, whose sum is σ = 12760722. Its totient is φ = 12760720.

The previous prime is 12760691. The next prime is 12760733. The reversal of 12760721 is 12706721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8202496 + 4558225 = 2864^2 + 2135^2 .

It is an emirp because it is prime and its reverse (12706721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12760721 is a prime.

It is not a weakly prime, because it can be changed into another prime (12760021) 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, 6380360 + 6380361.

It is an arithmetic number, because the mean of its divisors is an integer number (6380361).

Almost surely, 2^12760721 is an apocalyptic number.

It is an amenable number.

12760721 is a deficient number, since it is larger than the sum of its proper divisors (1).

12760721 is an equidigital number, since it uses as much as digits as its factorization.

12760721 is an odious number, because the sum of its binary digits is odd.

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

The square root of 12760721 is about 3572.2151390979. The cubic root of 12760721 is about 233.6818978592.

The spelling of 12760721 in words is "twelve million, seven hundred sixty thousand, seven hundred twenty-one".