1200001171 has 2 divisors, whose sum is σ = 1200001172. Its totient is φ = 1200001170.

The previous prime is 1200001163. The next prime is 1200001189. The reversal of 1200001171 is 1711000021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200001171 - 2³ = 1200001163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200001141) 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, 600000585 + 600000586.

It is an arithmetic number, because the mean of its divisors is an integer number (600000586).

Almost surely, 2^1200001171 is an apocalyptic number.

1200001171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200001171 is an equidigital number, since it uses as much as digits as its factorization.

1200001171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14, while the sum is 13.

The square root of 1200001171 is about 34641.0330533026. The cubic root of 1200001171 is about 1062.6589148417.

Adding to 1200001171 its reverse (1711000021), we get a palindrome (2911001192).

The spelling of 1200001171 in words is "one billion, two hundred million, one thousand, one hundred seventy-one".