985555 has 8 divisors (see below), whose sum is σ = 1188000. Its totient is φ = 784896.

The previous prime is 985547. The next prime is 985571. The reversal of 985555 is 555589.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 985555 - 2³ = 985547 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1971 + ... + 2419.

It is an arithmetic number, because the mean of its divisors is an integer number (148500).

2⁹⁸⁵⁵⁵⁵ is an apocalyptic number.

985555 is a deficient number, since it is larger than the sum of its proper divisors (202445).

985555 is a wasteful number, since it uses less digits than its factorization.

985555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893.

The product of its digits is 45000, while the sum is 37.

The square root of 985555 is about 992.7512276497. The cubic root of 985555 is about 99.5161627911.

It can be divided in two parts, 985 and 555, that added together give a triangular number (1540 = T₅₅).

The spelling of 985555 in words is "nine hundred eighty-five thousand, five hundred fifty-five".