9821025 has 18 divisors (see below), whose sum is σ = 17590950. Its totient is φ = 5237760.

The previous prime is 9820997. The next prime is 9821033. The reversal of 9821025 is 5201289.

It can be written as a sum of positive squares in 3 ways, for example, as 603729 + 9217296 = 777^2 + 3036^2 .

It is not a de Polignac number, because 9821025 - 2⁶ = 9820961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9821025.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 21600 + ... + 22049.

It is an arithmetic number, because the mean of its divisors is an integer number (977275).

Almost surely, 2^9821025 is an apocalyptic number.

It is an amenable number.

9821025 is a deficient number, since it is larger than the sum of its proper divisors (7769925).

9821025 is a wasteful number, since it uses less digits than its factorization.

9821025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43665 (or 43657 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 9821025 is about 3133.8514642529. The cubic root of 9821025 is about 214.1504241258.

The spelling of 9821025 in words is "nine million, eight hundred twenty-one thousand, twenty-five".