1239747272 has 16 divisors (see below), whose sum is σ = 2332802700. Its totient is φ = 617666560.

The previous prime is 1239747269. The next prime is 1239747277. The reversal of 1239747272 is 2727479321.

It can be written as a sum of positive squares in 2 ways, for example, as 1197575236 + 42172036 = 34606^2 + 6494^2 .

It is not an unprimeable number, because it can be changed into a prime (1239747277) 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, 273497 + ... + 277992.

Almost surely, 2^1239747272 is an apocalyptic number.

It is an amenable number.

1239747272 is a deficient number, since it is larger than the sum of its proper divisors (1093055428).

1239747272 is a wasteful number, since it uses less digits than its factorization.

1239747272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551776 (or 551772 counting only the distinct ones).

The product of its digits is 296352, while the sum is 44.

The square root of 1239747272 is about 35210.0450439928. The cubic root of 1239747272 is about 1074.2640781106.

The spelling of 1239747272 in words is "one billion, two hundred thirty-nine million, seven hundred forty-seven thousand, two hundred seventy-two".