9900525 has 24 divisors (see below), whose sum is σ = 16543584. Its totient is φ = 5224000.

The previous prime is 9900509. The next prime is 9900529. The reversal of 9900525 is 5250099.

It is not a de Polignac number, because 9900525 - 2⁴ = 9900509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9900492 and 9900501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9900529) 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 23 ways as a sum of consecutive naturals, for example, 6922 + ... + 8228.

It is an arithmetic number, because the mean of its divisors is an integer number (689316).

Almost surely, 2^9900525 is an apocalyptic number.

It is an amenable number.

9900525 is a deficient number, since it is larger than the sum of its proper divisors (6643059).

9900525 is a wasteful number, since it uses less digits than its factorization.

9900525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421 (or 1416 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 9900525 is about 3146.5099713810. The cubic root of 9900525 is about 214.7267124419.

The spelling of 9900525 in words is "nine million, nine hundred thousand, five hundred twenty-five".