9975125 has 8 divisors (see below), whose sum is σ = 12449112. Its totient is φ = 7980000.

The previous prime is 9975109. The next prime is 9975131. The reversal of 9975125 is 5215799.

It can be written as a sum of positive squares in 4 ways, for example, as 1343281 + 8631844 = 1159^2 + 2938^2 .

It is not a de Polignac number, because 9975125 - 2⁴ = 9975109 is a prime.

It is a Duffinian number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 39776 + ... + 40025.

It is an arithmetic number, because the mean of its divisors is an integer number (1556139).

Almost surely, 2^9975125 is an apocalyptic number.

It is an amenable number.

9975125 is a deficient number, since it is larger than the sum of its proper divisors (2473987).

9975125 is an equidigital number, since it uses as much as digits as its factorization.

9975125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79816 (or 79806 counting only the distinct ones).

The product of its digits is 28350, while the sum is 38.

The square root of 9975125 is about 3158.3421283958. The cubic root of 9975125 is about 215.2646821340.

The spelling of 9975125 in words is "nine million, nine hundred seventy-five thousand, one hundred twenty-five".