1266545313 has 12 divisors (see below), whose sum is σ = 1995768528. Its totient is φ = 767603160.

The previous prime is 1266545299. The next prime is 1266545317. The reversal of 1266545313 is 3135456621.

1266545313 is a `hidden beast` number, since 12 + 66 + 54 + 531 + 3 = 666.

It is not a de Polignac number, because 1266545313 - 2⁵ = 1266545281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1266545317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6396595 + ... + 6396792.

It is an arithmetic number, because the mean of its divisors is an integer number (166314044).

Almost surely, 2^1266545313 is an apocalyptic number.

It is an amenable number.

1266545313 is a deficient number, since it is larger than the sum of its proper divisors (729223215).

1266545313 is a wasteful number, since it uses less digits than its factorization.

1266545313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12793404 (or 12793401 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 1266545313 is about 35588.5559274326. Note that the first 3 decimals coincide. The cubic root of 1266545313 is about 1081.9493010754.

The spelling of 1266545313 in words is "one billion, two hundred sixty-six million, five hundred forty-five thousand, three hundred thirteen".