1272856758391 has 8 divisors (see below), whose sum is σ = 1273546333664. Its totient is φ = 1272167337600.

The previous prime is 1272856758331. The next prime is 1272856758401. The reversal of 1272856758391 is 1938576582721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1272856758391 - 2³¹ = 1270709274743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272856758331) 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 in 7 ways as a sum of consecutive naturals, for example, 18887131 + ... + 18954403.

It is an arithmetic number, because the mean of its divisors is an integer number (159193291708).

Almost surely, 2^{1272856758391} is an apocalyptic number.

1272856758391 is a deficient number, since it is larger than the sum of its proper divisors (689575273).

1272856758391 is an equidigital number, since it uses as much as digits as its factorization.

1272856758391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77241.

The product of its digits is 50803200, while the sum is 64.

The spelling of 1272856758391 in words is "one trillion, two hundred seventy-two billion, eight hundred fifty-six million, seven hundred fifty-eight thousand, three hundred ninety-one".