9900250 has 24 divisors (see below), whose sum is σ = 18626868. Its totient is φ = 3940200.

The previous prime is 9900203. The next prime is 9900251. The reversal of 9900250 is 520099.

It can be written as a sum of positive squares in 2 ways, for example, as 6692569 + 3207681 = 2587^2 + 1791^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (9900251) 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 11 ways as a sum of consecutive naturals, for example, 49651 + ... + 49849.

Almost surely, 2^9900250 is an apocalyptic number.

9900250 is a deficient number, since it is larger than the sum of its proper divisors (8726618).

9900250 is an equidigital number, since it uses as much as digits as its factorization.

9900250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 9900250 is about 3146.4662718675. The cubic root of 9900250 is about 214.7247243186.

Multiplying 9900250 by its product of nonzero digits (810), we get a square (8019202500 = 89550²).

The spelling of 9900250 in words is "nine million, nine hundred thousand, two hundred fifty".