1266305056 has 12 divisors (see below), whose sum is σ = 2493038142. Its totient is φ = 633152512.

The previous prime is 1266305011. The next prime is 1266305059. The reversal of 1266305056 is 6505036621.

It can be written as a sum of positive squares in only one way, i.e., 1244960656 + 21344400 = 35284^2 + 4620^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1266305059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19785985 + ... + 19786048.

Almost surely, 2^1266305056 is an apocalyptic number.

1266305056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1266305056 is a deficient number, since it is larger than the sum of its proper divisors (1226733086).

1266305056 is an equidigital number, since it uses as much as digits as its factorization.

1266305056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39572043 (or 39572035 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 1266305056 is about 35585.1802861809. The cubic root of 1266305056 is about 1081.8808833807.

The spelling of 1266305056 in words is "one billion, two hundred sixty-six million, three hundred five thousand, fifty-six".