1272843163 has 2 divisors, whose sum is σ = 1272843164. Its totient is φ = 1272843162.

The previous prime is 1272843151. The next prime is 1272843197. The reversal of 1272843163 is 3613482721.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1272843163 - 2⁹ = 1272842651 is a prime.

It is not a weakly prime, because it can be changed into another prime (1272843113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636421581 + 636421582.

It is an arithmetic number, because the mean of its divisors is an integer number (636421582).

Almost surely, 2^1272843163 is an apocalyptic number.

1272843163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272843163 is an equidigital number, since it uses as much as digits as its factorization.

1272843163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 1272843163 is about 35676.9276003414. The cubic root of 1272843163 is about 1083.7396545634.

The spelling of 1272843163 in words is "one billion, two hundred seventy-two million, eight hundred forty-three thousand, one hundred sixty-three".