9872125 has 8 divisors (see below), whose sum is σ = 12320568. Its totient is φ = 7897600.

The previous prime is 9872123. The next prime is 9872131. The reversal of 9872125 is 5212789.

It can be written as a sum of positive squares in 4 ways, for example, as 268324 + 9603801 = 518^2 + 3099^2 .

It is not a de Polignac number, because 9872125 - 2¹ = 9872123 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9872123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39364 + ... + 39613.

It is an arithmetic number, because the mean of its divisors is an integer number (1540071).

Almost surely, 2^9872125 is an apocalyptic number.

It is an amenable number.

9872125 is a deficient number, since it is larger than the sum of its proper divisors (2448443).

9872125 is an equidigital number, since it uses as much as digits as its factorization.

9872125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78992 (or 78982 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 9872125 is about 3141.9937937558. The cubic root of 9872125 is about 214.5211987967.

The spelling of 9872125 in words is "nine million, eight hundred seventy-two thousand, one hundred twenty-five".