1272751871 has 2 divisors, whose sum is σ = 1272751872. Its totient is φ = 1272751870.

The previous prime is 1272751867. The next prime is 1272751877. The reversal of 1272751871 is 1781572721.

It is a weak prime.

It is an emirp because it is prime and its reverse (1781572721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1272751871 - 2² = 1272751867 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272751877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636375935 + 636375936.

It is an arithmetic number, because the mean of its divisors is an integer number (636375936).

Almost surely, 2^1272751871 is an apocalyptic number.

1272751871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272751871 is an equidigital number, since it uses as much as digits as its factorization.

1272751871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54880, while the sum is 41.

The square root of 1272751871 is about 35675.6481510848. The cubic root of 1272751871 is about 1083.7137442945.

The spelling of 1272751871 in words is "one billion, two hundred seventy-two million, seven hundred fifty-one thousand, eight hundred seventy-one".