9804921 has 16 divisors (see below), whose sum is σ = 15052800. Its totient is φ = 5560848.

The previous prime is 9804911. The next prime is 9804941. The reversal of 9804921 is 1294089.

It is not a de Polignac number, because 9804921 - 2⁷ = 9804793 is a prime.

It is a super-2 number, since 2×9804921² = 192272951632482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9804901) 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 15 ways as a sum of consecutive naturals, for example, 1240 + ... + 4598.

It is an arithmetic number, because the mean of its divisors is an integer number (940800).

Almost surely, 2^9804921 is an apocalyptic number.

It is an amenable number.

9804921 is a deficient number, since it is larger than the sum of its proper divisors (5247879).

9804921 is a wasteful number, since it uses less digits than its factorization.

9804921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3508.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 9804921 is about 3131.2810477503. The cubic root of 9804921 is about 214.0333092240.

The spelling of 9804921 in words is "nine million, eight hundred four thousand, nine hundred twenty-one".