9920625 has 80 divisors (see below), whose sum is σ = 19943616. Its totient is φ = 4320000.

The previous prime is 9920621. The next prime is 9920653. The reversal of 9920625 is 5260299.

It is not a de Polignac number, because 9920625 - 2² = 9920621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9920621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 268107 + ... + 268143.

Almost surely, 2^9920625 is an apocalyptic number.

It is an amenable number.

9920625 is an abundant number, since it is smaller than the sum of its proper divisors (10022991).

9920625 is a wasteful number, since it uses less digits than its factorization.

9920625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 9920625 is about 3149.7023668912. The cubic root of 9920625 is about 214.8719266075.

The spelling of 9920625 in words is "nine million, nine hundred twenty thousand, six hundred twenty-five".