1272819523 has 2 divisors, whose sum is σ = 1272819524. Its totient is φ = 1272819522.

The previous prime is 1272819511. The next prime is 1272819533. The reversal of 1272819523 is 3259182721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1272819523 - 2²¹ = 1270722371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1272819503) 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 as a sum of consecutive naturals, namely, 636409761 + 636409762.

It is an arithmetic number, because the mean of its divisors is an integer number (636409762).

Almost surely, 2^1272819523 is an apocalyptic number.

1272819523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272819523 is an equidigital number, since it uses as much as digits as its factorization.

1272819523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 1272819523 is about 35676.5962922474. The cubic root of 1272819523 is about 1083.7329452361.

The spelling of 1272819523 in words is "one billion, two hundred seventy-two million, eight hundred nineteen thousand, five hundred twenty-three".