985871 has 2 divisors, whose sum is σ = 985872. Its totient is φ = 985870.

The previous prime is 985867. The next prime is 985877. The reversal of 985871 is 178589.

985871 is nontrivially palindromic in base 16.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 985871 - 2² = 985867 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985877) 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, 492935 + 492936.

It is an arithmetic number, because the mean of its divisors is an integer number (492936).

2⁹⁸⁵⁸⁷¹ is an apocalyptic number.

985871 is a deficient number, since it is larger than the sum of its proper divisors (1).

985871 is an equidigital number, since it uses as much as digits as its factorization.

985871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 38.

The square root of 985871 is about 992.9103685630. The cubic root of 985871 is about 99.5267976608.

The spelling of 985871 in words is "nine hundred eighty-five thousand, eight hundred seventy-one".