1271098458771 has 4 divisors (see below), whose sum is σ = 1694797945032. Its totient is φ = 847398972512.

The previous prime is 1271098458767. The next prime is 1271098458779. The reversal of 1271098458771 is 1778548901721.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1271098458771 - 2² = 1271098458767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1271098458779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211849743126 + ... + 211849743131.

It is an arithmetic number, because the mean of its divisors is an integer number (423699486258).

Almost surely, 2^{1271098458771} is an apocalyptic number.

1271098458771 is a deficient number, since it is larger than the sum of its proper divisors (423699486261).

1271098458771 is an equidigital number, since it uses as much as digits as its factorization.

1271098458771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423699486260.

The product of its (nonzero) digits is 7902720, while the sum is 60.

The spelling of 1271098458771 in words is "one trillion, two hundred seventy-one billion, ninety-eight million, four hundred fifty-eight thousand, seven hundred seventy-one".