1288171 has 2 divisors, whose sum is σ = 1288172. Its totient is φ = 1288170.

The previous prime is 1288169. The next prime is 1288187. The reversal of 1288171 is 1718821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1288171 - 2¹ = 1288169 is a prime.

Together with 1288169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1288571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644085 + 644086.

It is an arithmetic number, because the mean of its divisors is an integer number (644086).

2^1288171 is an apocalyptic number.

1288171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288171 is an equidigital number, since it uses as much as digits as its factorization.

1288171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 28.

The square root of 1288171 is about 1134.9762112044. The cubic root of 1288171 is about 108.8072513099.

The spelling of 1288171 in words is "one million, two hundred eighty-eight thousand, one hundred seventy-one".