1272775393 has 2 divisors, whose sum is σ = 1272775394. Its totient is φ = 1272775392.

The previous prime is 1272775381. The next prime is 1272775411. The reversal of 1272775393 is 3935772721.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 674337024 + 598438369 = 25968^2 + 24463^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1272775393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1272775093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636387696 + 636387697.

It is an arithmetic number, because the mean of its divisors is an integer number (636387697).

Almost surely, 2^1272775393 is an apocalyptic number.

It is an amenable number.

1272775393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272775393 is an equidigital number, since it uses as much as digits as its factorization.

1272775393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 555660, while the sum is 46.

The square root of 1272775393 is about 35675.9778142099. The cubic root of 1272775393 is about 1083.7204203686.

The spelling of 1272775393 in words is "one billion, two hundred seventy-two million, seven hundred seventy-five thousand, three hundred ninety-three".