1266772273 has 8 divisors (see below), whose sum is σ = 1383431616. Its totient is φ = 1152858000.

The previous prime is 1266772271. The next prime is 1266772277. The reversal of 1266772273 is 3722776621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266772273 - 2¹ = 1266772271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266772271) 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 7 ways as a sum of consecutive naturals, for example, 685303 + ... + 687148.

It is an arithmetic number, because the mean of its divisors is an integer number (172928952).

Almost surely, 2^1266772273 is an apocalyptic number.

1266772273 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1266772273 is a deficient number, since it is larger than the sum of its proper divisors (116659343).

1266772273 is a wasteful number, since it uses less digits than its factorization.

1266772273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372535.

The product of its digits is 296352, while the sum is 43.

The square root of 1266772273 is about 35591.7444500828. The cubic root of 1266772273 is about 1082.0139242528.

The spelling of 1266772273 in words is "one billion, two hundred sixty-six million, seven hundred seventy-two thousand, two hundred seventy-three".