985571 has 2 divisors, whose sum is σ = 985572. Its totient is φ = 985570.

The previous prime is 985547. The next prime is 985597. The reversal of 985571 is 175589.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985571 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (985531) 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, 492785 + 492786.

It is an arithmetic number, because the mean of its divisors is an integer number (492786).

2⁹⁸⁵⁵⁷¹ is an apocalyptic number.

985571 is a deficient number, since it is larger than the sum of its proper divisors (1).

985571 is an equidigital number, since it uses as much as digits as its factorization.

985571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 35.

The square root of 985571 is about 992.7592860306. The cubic root of 985571 is about 99.5167013201.

The spelling of 985571 in words is "nine hundred eighty-five thousand, five hundred seventy-one".