985559 has 4 divisors (see below), whose sum is σ = 989040. Its totient is φ = 982080.

The previous prime is 985547. The next prime is 985571. The reversal of 985559 is 955589.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (985547) and next prime (985571).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1274 + ... + 1895.

It is an arithmetic number, because the mean of its divisors is an integer number (247260).

2⁹⁸⁵⁵⁵⁹ is an apocalyptic number.

985559 is a deficient number, since it is larger than the sum of its proper divisors (3481).

985559 is a wasteful number, since it uses less digits than its factorization.

985559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3480.

The product of its digits is 81000, while the sum is 41.

The square root of 985559 is about 992.7532422511. The cubic root of 985559 is about 99.5162974239.

The spelling of 985559 in words is "nine hundred eighty-five thousand, five hundred fifty-nine".