1272047291 has 2 divisors, whose sum is σ = 1272047292. Its totient is φ = 1272047290.

The previous prime is 1272047279. The next prime is 1272047297. The reversal of 1272047291 is 1927402721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1272047291 - 2²² = 1267852987 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1272047297) 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, 636023645 + 636023646.

It is an arithmetic number, because the mean of its divisors is an integer number (636023646).

Almost surely, 2^1272047291 is an apocalyptic number.

1272047291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272047291 is an equidigital number, since it uses as much as digits as its factorization.

1272047291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 1272047291 is about 35665.7719809904. The cubic root of 1272047291 is about 1083.5137304529.

The spelling of 1272047291 in words is "one billion, two hundred seventy-two million, forty-seven thousand, two hundred ninety-one".