985511 has 4 divisors (see below), whose sum is σ = 1037400. Its totient is φ = 933624.

The previous prime is 985499. The next prime is 985519. The reversal of 985511 is 115589.

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

It is a cyclic number.

It is not a de Polignac number, because 985511 - 2⁶ = 985447 is a prime.

It is a super-2 number, since 2×985511² = 1942463862242, which contains 22 as substring.

It is a nialpdrome in base 10.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25916 + ... + 25953.

It is an arithmetic number, because the mean of its divisors is an integer number (259350).

2⁹⁸⁵⁵¹¹ is an apocalyptic number.

985511 is a deficient number, since it is larger than the sum of its proper divisors (51889).

985511 is a wasteful number, since it uses less digits than its factorization.

985511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51888.

The product of its digits is 1800, while the sum is 29.

The square root of 985511 is about 992.7290667649. The cubic root of 985511 is about 99.5146818061.

The spelling of 985511 in words is "nine hundred eighty-five thousand, five hundred eleven".