1272173065 has 4 divisors (see below), whose sum is σ = 1526607684. Its totient is φ = 1017738448.

The previous prime is 1272173047. The next prime is 1272173083. The reversal of 1272173065 is 5603712721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5603712721 = 719 ⋅7793759.

It is an interprime number because it is at equal distance from previous prime (1272173047) and next prime (1272173083).

It can be written as a sum of positive squares in 2 ways, for example, as 785176441 + 486996624 = 28021^2 + 22068^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272173065 - 2⁹ = 1272172553 is a prime.

It is a super-2 number, since 2×1272173065² = 3236848614622988450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1272173065.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127217302 + ... + 127217311.

It is an arithmetic number, because the mean of its divisors is an integer number (381651921).

Almost surely, 2^1272173065 is an apocalyptic number.

It is an amenable number.

1272173065 is a deficient number, since it is larger than the sum of its proper divisors (254434619).

1272173065 is an equidigital number, since it uses as much as digits as its factorization.

1272173065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254434618.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 1272173065 is about 35667.5351685535. The cubic root of 1272173065 is about 1083.5494401748.

Adding to 1272173065 its reverse (5603712721), we get a palindrome (6875885786).

The spelling of 1272173065 in words is "one billion, two hundred seventy-two million, one hundred seventy-three thousand, sixty-five".