1272100403591 has 2 divisors, whose sum is σ = 1272100403592. Its totient is φ = 1272100403590.

The previous prime is 1272100403573. The next prime is 1272100403657. The reversal of 1272100403591 is 1953040012721.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1272100403591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272100403191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636050201795 + 636050201796.

It is an arithmetic number, because the mean of its divisors is an integer number (636050201796).

Almost surely, 2^{1272100403591} is an apocalyptic number.

1272100403591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272100403591 is an equidigital number, since it uses as much as digits as its factorization.

1272100403591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 1272100403591 in words is "one trillion, two hundred seventy-two billion, one hundred million, four hundred three thousand, five hundred ninety-one".