1266275275 has 6 divisors (see below), whose sum is σ = 1570181372. Its totient is φ = 1013020200.

The previous prime is 1266275249. The next prime is 1266275291. The reversal of 1266275275 is 5725726621.

It is not a de Polignac number, because 1266275275 - 2¹⁵ = 1266242507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 25325481 + ... + 25325530.

Almost surely, 2^1266275275 is an apocalyptic number.

1266275275 is a deficient number, since it is larger than the sum of its proper divisors (303906097).

1266275275 is an equidigital number, since it uses as much as digits as its factorization.

1266275275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50651021 (or 50651016 counting only the distinct ones).

The product of its digits is 352800, while the sum is 43.

The square root of 1266275275 is about 35584.7618370560. The cubic root of 1266275275 is about 1081.8724020786.

The spelling of 1266275275 in words is "one billion, two hundred sixty-six million, two hundred seventy-five thousand, two hundred seventy-five".