12776641 has 2 divisors, whose sum is σ = 12776642. Its totient is φ = 12776640.

The previous prime is 12776629. The next prime is 12776671. The reversal of 12776641 is 14667721.

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., 12673600 + 103041 = 3560^2 + 321^2 .

It is a cyclic number.

It is not a de Polignac number, because 12776641 - 2⁷ = 12776513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12776597 and 12776606.

It is not a weakly prime, because it can be changed into another prime (12776611) 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, 6388320 + 6388321.

It is an arithmetic number, because the mean of its divisors is an integer number (6388321).

Almost surely, 2^12776641 is an apocalyptic number.

It is an amenable number.

12776641 is a deficient number, since it is larger than the sum of its proper divisors (1).

12776641 is an equidigital number, since it uses as much as digits as its factorization.

12776641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 34.

The square root of 12776641 is about 3574.4427537730. The cubic root of 12776641 is about 233.7790363045.

The spelling of 12776641 in words is "twelve million, seven hundred seventy-six thousand, six hundred forty-one".