1271298773 has 2 divisors, whose sum is σ = 1271298774. Its totient is φ = 1271298772.

The previous prime is 1271298751. The next prime is 1271298851. The reversal of 1271298773 is 3778921721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 715188049 + 556110724 = 26743^2 + 23582^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271298773 - 2¹⁰ = 1271297749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1271298713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635649386 + 635649387.

It is an arithmetic number, because the mean of its divisors is an integer number (635649387).

Almost surely, 2^1271298773 is an apocalyptic number.

It is an amenable number.

1271298773 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271298773 is an equidigital number, since it uses as much as digits as its factorization.

1271298773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 47.

The square root of 1271298773 is about 35655.2769306312. The cubic root of 1271298773 is about 1083.3011627107.

The spelling of 1271298773 in words is "one billion, two hundred seventy-one million, two hundred ninety-eight thousand, seven hundred seventy-three".