1271117 has 2 divisors, whose sum is σ = 1271118. Its totient is φ = 1271116.

The previous prime is 1271111. The next prime is 1271129. The reversal of 1271117 is 7111721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1012036 + 259081 = 1006^2 + 509^2 .

It is an emirp because it is prime and its reverse (7111721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1271117 - 2⁸ = 1270861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1271111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635558 + 635559.

It is an arithmetic number, because the mean of its divisors is an integer number (635559).

2^1271117 is an apocalyptic number.

It is an amenable number.

1271117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271117 is an equidigital number, since it uses as much as digits as its factorization.

1271117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98, while the sum is 20.

The square root of 1271117 is about 1127.4382466459. The cubic root of 1271117 is about 108.3249529349.

Adding to 1271117 its product of digits (98), we get a triangular number (1271215 = T₁₅₉₄).

Adding to 1271117 its reverse (7111721), we get a palindrome (8382838).

The spelling of 1271117 in words is "one million, two hundred seventy-one thousand, one hundred seventeen".