9725985 has 12 divisors (see below), whose sum is σ = 16858452. Its totient is φ = 5187168.

The previous prime is 9725959. The next prime is 9726001. The reversal of 9725985 is 5895279.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7033104 + 2692881 = 2652^2 + 1641^2 .

It is not a de Polignac number, because 9725985 - 2⁵ = 9725953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 216133 = 9725985 / (9 + 7 + 2 + 5 + 9 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 9725985.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108022 + ... + 108111.

It is an arithmetic number, because the mean of its divisors is an integer number (1404871).

Almost surely, 2^9725985 is an apocalyptic number.

It is an amenable number.

9725985 is a deficient number, since it is larger than the sum of its proper divisors (7132467).

9725985 is a wasteful number, since it uses less digits than its factorization.

9725985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216144 (or 216141 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 9725985 is about 3118.6511507381. The cubic root of 9725985 is about 213.4573917645.

It can be divided in two parts, 97259 and 85, that added together give a square (97344 = 312²).

The spelling of 9725985 in words is "nine million, seven hundred twenty-five thousand, nine hundred eighty-five".