1273438427273 has 4 divisors (see below), whose sum is σ = 1286566658580. Its totient is φ = 1260310195968.

The previous prime is 1273438427227. The next prime is 1273438427309. The reversal of 1273438427273 is 3727248343721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 318493179904 + 954945247369 = 564352^2 + 977213^2 .

It is a cyclic number.

It is not a de Polignac number, because 1273438427273 - 2⁸ = 1273438427017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1273438427203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6564115508 + ... + 6564115701.

It is an arithmetic number, because the mean of its divisors is an integer number (321641664645).

Almost surely, 2^{1273438427273} is an apocalyptic number.

It is an amenable number.

1273438427273 is a deficient number, since it is larger than the sum of its proper divisors (13128231307).

1273438427273 is an equidigital number, since it uses as much as digits as its factorization.

1273438427273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13128231306.

The product of its digits is 9483264, while the sum is 53.

The spelling of 1273438427273 in words is "one trillion, two hundred seventy-three billion, four hundred thirty-eight million, four hundred twenty-seven thousand, two hundred seventy-three".