9920925 has 36 divisors (see below), whose sum is σ = 20311200. Its totient is φ = 4534560.

The previous prime is 9920923. The next prime is 9920947. The reversal of 9920925 is 5290299.

It is not a de Polignac number, because 9920925 - 2¹ = 9920923 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9920925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920923) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 1575 + ... + 4724.

It is an arithmetic number, because the mean of its divisors is an integer number (564200).

Almost surely, 2^9920925 is an apocalyptic number.

It is an amenable number.

9920925 is an abundant number, since it is smaller than the sum of its proper divisors (10390275).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9920925 is a wasteful number, since it uses less digits than its factorization.

9920925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6322 (or 6314 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 9920925 is about 3149.7499900786. The cubic root of 9920925 is about 214.8740924969.

The spelling of 9920925 in words is "nine million, nine hundred twenty thousand, nine hundred twenty-five".