12761321 has 2 divisors, whose sum is σ = 12761322. Its totient is φ = 12761320.

The previous prime is 12761317. The next prime is 12761347. The reversal of 12761321 is 12316721.

12761321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8620096 + 4141225 = 2936^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 12761321 - 2² = 12761317 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12761311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6380660 + 6380661.

It is an arithmetic number, because the mean of its divisors is an integer number (6380661).

Almost surely, 2^12761321 is an apocalyptic number.

It is an amenable number.

12761321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12761321 is an equidigital number, since it uses as much as digits as its factorization.

12761321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 23.

The square root of 12761321 is about 3572.2991196147. The cubic root of 12761321 is about 233.6855603205.

The spelling of 12761321 in words is "twelve million, seven hundred sixty-one thousand, three hundred twenty-one".