1266772272 has 40 divisors (see below), whose sum is σ = 3464996976. Its totient is φ = 397418496.

The previous prime is 1266772271. The next prime is 1266772277. The reversal of 1266772272 is 2722776621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1266772271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775393 + ... + 777024.

Almost surely, 2^1266772272 is an apocalyptic number.

1266772272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1266772272 is an abundant number, since it is smaller than the sum of its proper divisors (2198224704).

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

1266772272 is a wasteful number, since it uses less digits than its factorization.

1266772272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552445 (or 1552439 counting only the distinct ones).

The product of its digits is 197568, while the sum is 42.

The square root of 1266772272 is about 35591.7444360346. The cubic root of 1266772272 is about 1082.0139239680.

The spelling of 1266772272 in words is "one billion, two hundred sixty-six million, seven hundred seventy-two thousand, two hundred seventy-two".