1266345259 has 2 divisors, whose sum is σ = 1266345260. Its totient is φ = 1266345258.

The previous prime is 1266345211. The next prime is 1266345277. The reversal of 1266345259 is 9525436621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1266345259 - 2⁷ = 1266345131 is a prime.

It is not a weakly prime, because it can be changed into another prime (1266345559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633172629 + 633172630.

It is an arithmetic number, because the mean of its divisors is an integer number (633172630).

Almost surely, 2^1266345259 is an apocalyptic number.

1266345259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266345259 is an equidigital number, since it uses as much as digits as its factorization.

1266345259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 43.

The square root of 1266345259 is about 35585.7451657261. The cubic root of 1266345259 is about 1081.8923325431.

The spelling of 1266345259 in words is "one billion, two hundred sixty-six million, three hundred forty-five thousand, two hundred fifty-nine".