9881825 has 6 divisors (see below), whose sum is σ = 12253494. Its totient is φ = 7905440.

The previous prime is 9881821. The next prime is 9881827. The reversal of 9881825 is 5281889.

9881825 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 153664 + 9728161 = 392^2 + 3119^2 .

It is not a de Polignac number, because 9881825 - 2² = 9881821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9881821) 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 5 ways as a sum of consecutive naturals, for example, 197612 + ... + 197661.

It is an arithmetic number, because the mean of its divisors is an integer number (2042249).

Almost surely, 2^9881825 is an apocalyptic number.

It is an amenable number.

9881825 is a deficient number, since it is larger than the sum of its proper divisors (2371669).

9881825 is a wasteful number, since it uses less digits than its factorization.

9881825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395283 (or 395278 counting only the distinct ones).

The product of its digits is 46080, while the sum is 41.

The square root of 9881825 is about 3143.5370206187. The cubic root of 9881825 is about 214.5914361055.

The spelling of 9881825 in words is "nine million, eight hundred eighty-one thousand, eight hundred twenty-five".