9859825 has 6 divisors (see below), whose sum is σ = 12226214. Its totient is φ = 7887840.

The previous prime is 9859823. The next prime is 9859831. The reversal of 9859825 is 5289589.

9859825 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 3504384 + 6355441 = 1872^2 + 2521^2 .

It is not a de Polignac number, because 9859825 - 2¹ = 9859823 is a prime.

It is a super-2 number, since 2×9859825² = 194432298061250, which contains 22 as substring.

It is a Duffinian number.

9859825 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9859823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197172 + ... + 197221.

Almost surely, 2^9859825 is an apocalyptic number.

It is an amenable number.

9859825 is a deficient number, since it is larger than the sum of its proper divisors (2366389).

9859825 is a wasteful number, since it uses less digits than its factorization.

9859825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394403 (or 394398 counting only the distinct ones).

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

The square root of 9859825 is about 3140.0358278211. The cubic root of 9859825 is about 214.4320688020.

The spelling of 9859825 in words is "nine million, eight hundred fifty-nine thousand, eight hundred twenty-five".