1272715738 has 8 divisors (see below), whose sum is σ = 2181798432. Its totient is φ = 545449596.

The previous prime is 1272715733. The next prime is 1272715747. The reversal of 1272715738 is 8375172721.

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

It is a junction number, because it is equal to n+sod(n) for n = 1272715694 and 1272715703.

It is not an unprimeable number, because it can be changed into a prime (1272715733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45454120 + ... + 45454147.

It is an arithmetic number, because the mean of its divisors is an integer number (272724804).

Almost surely, 2^1272715738 is an apocalyptic number.

1272715738 is a deficient number, since it is larger than the sum of its proper divisors (909082694).

1272715738 is an equidigital number, since it uses as much as digits as its factorization.

1272715738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90908276.

The product of its digits is 164640, while the sum is 43.

The square root of 1272715738 is about 35675.1417376301. The cubic root of 1272715738 is about 1083.7034887738.

The spelling of 1272715738 in words is "one billion, two hundred seventy-two million, seven hundred fifteen thousand, seven hundred thirty-eight".