1261227272 has 16 divisors (see below), whose sum is σ = 2365596240. Its totient is φ = 630401616.

The previous prime is 1261227257. The next prime is 1261227307. The reversal of 1261227272 is 2727221621.

It is an unprimeable number.

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, 383 + ... + 50225.

It is an arithmetic number, because the mean of its divisors is an integer number (147849765).

Almost surely, 2^1261227272 is an apocalyptic number.

It is an amenable number.

1261227272 is a deficient number, since it is larger than the sum of its proper divisors (1104368968).

1261227272 is a wasteful number, since it uses less digits than its factorization.

1261227272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53012 (or 53008 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 1261227272 is about 35513.7617269700. The cubic root of 1261227272 is about 1080.4328603242.

Adding to 1261227272 its reverse (2727221621), we get a palindrome (3988448893).

The spelling of 1261227272 in words is "one billion, two hundred sixty-one million, two hundred twenty-seven thousand, two hundred seventy-two".