9998125 has 20 divisors (see below), whose sum is σ = 13242636. Its totient is φ = 7520000.

The previous prime is 9998119. The next prime is 9998129. The reversal of 9998125 is 5218999.

9998125 is digitally balanced in base 2, 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 10 ways, for example, as 5750404 + 4247721 = 2398^2 + 2061^2 .

It is not a de Polignac number, because 9998125 - 2³ = 9998117 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998129) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10155 + ... + 11095.

Almost surely, 2^9998125 is an apocalyptic number.

It is an amenable number.

9998125 is a deficient number, since it is larger than the sum of its proper divisors (3244511).

9998125 is an equidigital number, since it uses as much as digits as its factorization.

9998125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978 (or 963 counting only the distinct ones).

The product of its digits is 58320, while the sum is 43.

The square root of 9998125 is about 3161.9811827397. The cubic root of 9998125 is about 215.4300029447.

The spelling of 9998125 in words is "nine million, nine hundred ninety-eight thousand, one hundred twenty-five".