1261171 has 2 divisors, whose sum is σ = 1261172. Its totient is φ = 1261170.

The previous prime is 1261157. The next prime is 1261177. The reversal of 1261171 is 1711621.

It is a strong prime.

It is an emirp because it is prime and its reverse (1711621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1261171 - 2¹¹ = 1259123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1261177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630585 + 630586.

It is an arithmetic number, because the mean of its divisors is an integer number (630586).

2^1261171 is an apocalyptic number.

1261171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261171 is an equidigital number, since it uses as much as digits as its factorization.

1261171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 19.

The square root of 1261171 is about 1123.0186997553. The cubic root of 1261171 is about 108.0416791578.

Adding to 1261171 its reverse (1711621), we get a palindrome (2972792).

The spelling of 1261171 in words is "one million, two hundred sixty-one thousand, one hundred seventy-one".