1271353217 has 2 divisors, whose sum is σ = 1271353218. Its totient is φ = 1271353216.

The previous prime is 1271353201. The next prime is 1271353229. The reversal of 1271353217 is 7123531721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 907154161 + 364199056 = 30119^2 + 19084^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271353217 - 2⁴ = 1271353201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1271353817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635676608 + 635676609.

It is an arithmetic number, because the mean of its divisors is an integer number (635676609).

Almost surely, 2^1271353217 is an apocalyptic number.

It is an amenable number.

1271353217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271353217 is an equidigital number, since it uses as much as digits as its factorization.

1271353217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 32.

The square root of 1271353217 is about 35656.0403999098. The cubic root of 1271353217 is about 1083.3166267930.

Adding to 1271353217 its reverse (7123531721), we get a palindrome (8394884938).

The spelling of 1271353217 in words is "one billion, two hundred seventy-one million, three hundred fifty-three thousand, two hundred seventeen".