1266396101 has 2 divisors, whose sum is σ = 1266396102. Its totient is φ = 1266396100.

The previous prime is 1266396091. The next prime is 1266396133. The reversal of 1266396101 is 1016936621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 904445476 + 361950625 = 30074^2 + 19025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266396101 - 2²⁶ = 1199287237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266396191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633198050 + 633198051.

It is an arithmetic number, because the mean of its divisors is an integer number (633198051).

Almost surely, 2^1266396101 is an apocalyptic number.

It is an amenable number.

1266396101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266396101 is an equidigital number, since it uses as much as digits as its factorization.

1266396101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 1266396101 is about 35586.4595176311. The cubic root of 1266396101 is about 1081.9068111733.

The spelling of 1266396101 in words is "one billion, two hundred sixty-six million, three hundred ninety-six thousand, one hundred one".