1271071349 has 2 divisors, whose sum is σ = 1271071350. Its totient is φ = 1271071348.

The previous prime is 1271071343. The next prime is 1271071423. The reversal of 1271071349 is 9431701721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 784560100 + 486511249 = 28010^2 + 22057^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1271071349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1271071343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635535674 + 635535675.

It is an arithmetic number, because the mean of its divisors is an integer number (635535675).

Almost surely, 2^1271071349 is an apocalyptic number.

It is an amenable number.

1271071349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271071349 is an equidigital number, since it uses as much as digits as its factorization.

1271071349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 1271071349 is about 35652.0875826367. The cubic root of 1271071349 is about 1083.2365612230.

The spelling of 1271071349 in words is "one billion, two hundred seventy-one million, seventy-one thousand, three hundred forty-nine".