1266534306 has 80 divisors (see below), whose sum is σ = 3021321600. Its totient is φ = 395176320.

The previous prime is 1266534301. The next prime is 1266534317. The reversal of 1266534306 is 6034356621.

It is not an unprimeable number, because it can be changed into a prime (1266534301) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 546891 + ... + 549201.

It is an arithmetic number, because the mean of its divisors is an integer number (37766520).

Almost surely, 2^1266534306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266534306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1510660800).

1266534306 is an abundant number, since it is smaller than the sum of its proper divisors (1754787294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266534306 is a wasteful number, since it uses less digits than its factorization.

1266534306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541 (or 2532 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 1266534306 is about 35588.4012846882. The cubic root of 1266534306 is about 1081.9461668145.

It can be divided in two parts, 12665 and 34306, that added together give a triangular number (46971 = T₃₀₆).

The spelling of 1266534306 in words is "one billion, two hundred sixty-six million, five hundred thirty-four thousand, three hundred six".