1268385901 has 2 divisors, whose sum is σ = 1268385902. Its totient is φ = 1268385900.

The previous prime is 1268385889. The next prime is 1268385919. The reversal of 1268385901 is 1095838621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 907575876 + 360810025 = 30126^2 + 18995^2 .

It is an emirp because it is prime and its reverse (1095838621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1268385901 - 2²⁵ = 1234831469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1268385971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634192950 + 634192951.

It is an arithmetic number, because the mean of its divisors is an integer number (634192951).

Almost surely, 2^1268385901 is an apocalyptic number.

It is an amenable number.

1268385901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268385901 is an equidigital number, since it uses as much as digits as its factorization.

1268385901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 1268385901 is about 35614.4058072011. The cubic root of 1268385901 is about 1082.4731562662.

The spelling of 1268385901 in words is "one billion, two hundred sixty-eight million, three hundred eighty-five thousand, nine hundred one".