1216659272 has 32 divisors (see below), whose sum is σ = 2362159800. Its totient is φ = 586790400.

The previous prime is 1216659259. The next prime is 1216659277. The reversal of 1216659272 is 2729566121.

It can be written as a sum of positive squares in 4 ways, for example, as 979314436 + 237344836 = 31294^2 + 15406^2 .

It is not an unprimeable number, because it can be changed into a prime (1216659277) 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, 341822 + ... + 345362.

Almost surely, 2^1216659272 is an apocalyptic number.

It is an amenable number.

1216659272 is a deficient number, since it is larger than the sum of its proper divisors (1145500528).

1216659272 is a wasteful number, since it uses less digits than its factorization.

1216659272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5057 (or 5053 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 1216659272 is about 34880.6432280140. The cubic root of 1216659272 is about 1067.5535196491.

The spelling of 1216659272 in words is "one billion, two hundred sixteen million, six hundred fifty-nine thousand, two hundred seventy-two".