9806021 has 8 divisors (see below), whose sum is σ = 10141824. Its totient is φ = 9475200.

The previous prime is 9805997. The next prime is 9806029. The reversal of 9806021 is 1206089.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9806021 - 2¹⁰ = 9804997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9806029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2996 + ... + 5346.

It is an arithmetic number, because the mean of its divisors is an integer number (1267728).

Almost surely, 2^9806021 is an apocalyptic number.

It is an amenable number.

9806021 is a deficient number, since it is larger than the sum of its proper divisors (335803).

9806021 is a wasteful number, since it uses less digits than its factorization.

9806021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 9806021 is about 3131.4566897851. The cubic root of 9806021 is about 214.0413129545.

The spelling of 9806021 in words is "nine million, eight hundred six thousand, twenty-one".