9985825 has 6 divisors (see below), whose sum is σ = 12382454. Its totient is φ = 7988640.

The previous prime is 9985799. The next prime is 9985853. The reversal of 9985825 is 5285899.

It can be written as a sum of positive squares in 3 ways, for example, as 3549456 + 6436369 = 1884^2 + 2537^2 .

It is not a de Polignac number, because 9985825 - 2¹³ = 9977633 is a prime.

It is a Duffinian number.

9985825 is a lucky 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 5 ways as a sum of consecutive naturals, for example, 199692 + ... + 199741.

Almost surely, 2^9985825 is an apocalyptic number.

It is an amenable number.

9985825 is a deficient number, since it is larger than the sum of its proper divisors (2396629).

9985825 is a wasteful number, since it uses less digits than its factorization.

9985825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399443 (or 399438 counting only the distinct ones).

The product of its digits is 259200, while the sum is 46.

The square root of 9985825 is about 3160.0356010653. The cubic root of 9985825 is about 215.3416238271.

The spelling of 9985825 in words is "nine million, nine hundred eighty-five thousand, eight hundred twenty-five".