1273922256049 has 4 divisors (see below), whose sum is σ = 1348858859364. Its totient is φ = 1198985652736.

The previous prime is 1273922255989. The next prime is 1273922256073. The reversal of 1273922256049 is 9406522293721.

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 972872513649 + 301049742400 = 986343^2 + 548680^2 .

It is not a de Polignac number, because 1273922256049 - 2²³ = 1273913867441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1273922255987 and 1273922256005.

It is not an unprimeable number, because it can be changed into a prime (1273922266049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37468301632 + ... + 37468301665.

It is an arithmetic number, because the mean of its divisors is an integer number (337214714841).

Almost surely, 2^{1273922256049} is an apocalyptic number.

It is an amenable number.

1273922256049 is a deficient number, since it is larger than the sum of its proper divisors (74936603315).

1273922256049 is an equidigital number, since it uses as much as digits as its factorization.

1273922256049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74936603314.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 1273922256049 in words is "one trillion, two hundred seventy-three billion, nine hundred twenty-two million, two hundred fifty-six thousand, forty-nine".