9861925 has 12 divisors (see below), whose sum is σ = 12270916. Its totient is φ = 7862400.

The previous prime is 9861919. The next prime is 9861947. The reversal of 9861925 is 5291689.

It can be written as a sum of positive squares in 6 ways, for example, as 4848804 + 5013121 = 2202^2 + 2239^2 .

It is not a de Polignac number, because 9861925 - 2⁹ = 9861413 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 (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10057 + ... + 10993.

Almost surely, 2^9861925 is an apocalyptic number.

It is an amenable number.

9861925 is a deficient number, since it is larger than the sum of its proper divisors (2408991).

9861925 is a wasteful number, since it uses less digits than its factorization.

9861925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368 (or 1363 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The square root of 9861925 is about 3140.3702011069. The cubic root of 9861925 is about 214.4472913635.

The spelling of 9861925 in words is "nine million, eight hundred sixty-one thousand, nine hundred twenty-five".