9003521 has 6 divisors (see below), whose sum is σ = 9086322. Its totient is φ = 8921360.

The previous prime is 9003517. The next prime is 9003529. The reversal of 9003521 is 1253009.

It can be written as a sum of positive squares in only one way, i.e., 8202496 + 801025 = 2864^2 + 895^2 .

It is not a de Polignac number, because 9003521 - 2² = 9003517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9003493 and 9003502.

It is not an unprimeable number, because it can be changed into a prime (9003529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31901 + ... + 32181.

It is an arithmetic number, because the mean of its divisors is an integer number (1514387).

Almost surely, 2^9003521 is an apocalyptic number.

It is an amenable number.

9003521 is a deficient number, since it is larger than the sum of its proper divisors (82801).

9003521 is an equidigital number, since it uses as much as digits as its factorization.

9003521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 9003521 is about 3000.5867759490. The cubic root of 9003521 is about 208.0355046024.

The spelling of 9003521 in words is "nine million, three thousand, five hundred twenty-one".