12811577 has 2 divisors, whose sum is σ = 12811578. Its totient is φ = 12811576.

The previous prime is 12811571. The next prime is 12811597. The reversal of 12811577 is 77511821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12752041 + 59536 = 3571^2 + 244^2 .

It is a cyclic number.

It is not a de Polignac number, because 12811577 - 2⁸ = 12811321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12811571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6405788 + 6405789.

It is an arithmetic number, because the mean of its divisors is an integer number (6405789).

Almost surely, 2^12811577 is an apocalyptic number.

It is an amenable number.

12811577 is a deficient number, since it is larger than the sum of its proper divisors (1).

12811577 is an equidigital number, since it uses as much as digits as its factorization.

12811577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3920, while the sum is 32.

The square root of 12811577 is about 3579.3263332644. The cubic root of 12811577 is about 233.9919214588.

The spelling of 12811577 in words is "twelve million, eight hundred eleven thousand, five hundred seventy-seven".