9870125 has 12 divisors (see below), whose sum is σ = 12361908. Its totient is φ = 7868000.

The previous prime is 9870071. The next prime is 9870143. The reversal of 9870125 is 5210789.

9870125 = 2221² + 2222².

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 1684804 + 8185321 = 1298^2 + 2861^2 .

It is not a de Polignac number, because 9870125 - 2⁶ = 9870061 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9870091 and 9870100.

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 11 ways as a sum of consecutive naturals, for example, 34985 + ... + 35265.

It is an arithmetic number, because the mean of its divisors is an integer number (1030159).

Almost surely, 2^9870125 is an apocalyptic number.

9870125 is the 2222-nd centered square number.

It is an amenable number.

9870125 is a deficient number, since it is larger than the sum of its proper divisors (2491783).

9870125 is an frugal number, since it uses more digits than its factorization.

9870125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 9870125 is about 3141.6755083872. The cubic root of 9870125 is about 214.5067111569.

The spelling of 9870125 in words is "nine million, eight hundred seventy thousand, one hundred twenty-five".