12778741 has 2 divisors, whose sum is σ = 12778742. Its totient is φ = 12778740.

The previous prime is 12778729. The next prime is 12778769. The reversal of 12778741 is 14787721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12453841 + 324900 = 3529^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 12778741 - 2⁹ = 12778229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12778741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12778771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6389370 + 6389371.

It is an arithmetic number, because the mean of its divisors is an integer number (6389371).

Almost surely, 2^12778741 is an apocalyptic number.

It is an amenable number.

12778741 is a deficient number, since it is larger than the sum of its proper divisors (1).

12778741 is an equidigital number, since it uses as much as digits as its factorization.

12778741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21952, while the sum is 37.

The square root of 12778741 is about 3574.7364937852. The cubic root of 12778741 is about 233.7918437678.

The spelling of 12778741 in words is "twelve million, seven hundred seventy-eight thousand, seven hundred forty-one".