1271298881 has 2 divisors, whose sum is σ = 1271298882. Its totient is φ = 1271298880.

The previous prime is 1271298877. The next prime is 1271298893. The reversal of 1271298881 is 1888921721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1266719281 + 4579600 = 35591^2 + 2140^2 .

It is an emirp because it is prime and its reverse (1888921721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1271298881 - 2² = 1271298877 is a prime.

It is a super-2 number, since 2×1271298881² = 3232401689663704322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1271298851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635649440 + 635649441.

It is an arithmetic number, because the mean of its divisors is an integer number (635649441).

Almost surely, 2^1271298881 is an apocalyptic number.

It is an amenable number.

1271298881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271298881 is an equidigital number, since it uses as much as digits as its factorization.

1271298881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 47.

The square root of 1271298881 is about 35655.2784451335. The cubic root of 1271298881 is about 1083.3011933871.

The spelling of 1271298881 in words is "one billion, two hundred seventy-one million, two hundred ninety-eight thousand, eight hundred eighty-one".