1266729844 has 12 divisors (see below), whose sum is σ = 2238300064. Its totient is φ = 627215544.

The previous prime is 1266729797. The next prime is 1266729847. The reversal of 1266729844 is 4489276621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266729847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1536882 + ... + 1537705.

Almost surely, 2^1266729844 is an apocalyptic number.

It is an amenable number.

1266729844 is a deficient number, since it is larger than the sum of its proper divisors (971570220).

1266729844 is a wasteful number, since it uses less digits than its factorization.

1266729844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3074694 (or 3074692 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 49.

The square root of 1266729844 is about 35591.1483939476. The cubic root of 1266729844 is about 1082.0018438701.

The spelling of 1266729844 in words is "one billion, two hundred sixty-six million, seven hundred twenty-nine thousand, eight hundred forty-four".