9805825 has 6 divisors (see below), whose sum is σ = 12159254. Its totient is φ = 7844640.

The previous prime is 9805823. The next prime is 9805879. The reversal of 9805825 is 5285089.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1700416 + 8105409 = 1304^2 + 2847^2 .

It is not a de Polignac number, because 9805825 - 2¹ = 9805823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9805823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 196092 + ... + 196141.

It is a Proth number, since it is equal to 1197 ⋅ 2¹³ + 1 and 1197 < 2¹³.

Almost surely, 2^9805825 is an apocalyptic number.

It is an amenable number.

9805825 is a deficient number, since it is larger than the sum of its proper divisors (2353429).

9805825 is a wasteful number, since it uses less digits than its factorization.

9805825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392243 (or 392238 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 9805825 is about 3131.4253942893. The cubic root of 9805825 is about 214.0398868790.

The spelling of 9805825 in words is "nine million, eight hundred five thousand, eight hundred twenty-five".