1272798815 has 8 divisors (see below), whose sum is σ = 1529349360. Its totient is φ = 1016911872.

The previous prime is 1272798803. The next prime is 1272798827. The reversal of 1272798815 is 5188972721.

It is an interprime number because it is at equal distance from previous prime (1272798803) and next prime (1272798827).

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

It is a cyclic number.

It is not a de Polignac number, because 1272798815 - 2²⁰ = 1271750239 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161669 + ... + 169358.

It is an arithmetic number, because the mean of its divisors is an integer number (191168670).

Almost surely, 2^1272798815 is an apocalyptic number.

1272798815 is a deficient number, since it is larger than the sum of its proper divisors (256550545).

1272798815 is an equidigital number, since it uses as much as digits as its factorization.

1272798815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331801.

The product of its digits is 564480, while the sum is 50.

The square root of 1272798815 is about 35676.3060727985. The cubic root of 1272798815 is about 1083.7270679788.

The spelling of 1272798815 in words is "one billion, two hundred seventy-two million, seven hundred ninety-eight thousand, eight hundred fifteen".