1271453797 has 2 divisors, whose sum is σ = 1271453798. Its totient is φ = 1271453796.

The previous prime is 1271453789. The next prime is 1271453819. The reversal of 1271453797 is 7973541721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1215637956 + 55815841 = 34866^2 + 7471^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271453797 - 2³ = 1271453789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1271453767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635726898 + 635726899.

It is an arithmetic number, because the mean of its divisors is an integer number (635726899).

Almost surely, 2^1271453797 is an apocalyptic number.

It is an amenable number.

1271453797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271453797 is an equidigital number, since it uses as much as digits as its factorization.

1271453797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 370440, while the sum is 46.

The square root of 1271453797 is about 35657.4507922257. The cubic root of 1271453797 is about 1083.3451940214.

The spelling of 1271453797 in words is "one billion, two hundred seventy-one million, four hundred fifty-three thousand, seven hundred ninety-seven".