9404021 has 8 divisors (see below), whose sum is σ = 10404288. Its totient is φ = 8428000.

The previous prime is 9404011. The next prime is 9404029. The reversal of 9404021 is 1204049.

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 9404021 - 2¹⁰ = 9402997 is a prime.

It is a super-2 number, since 2×9404021² = 176871221936882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9403984 and 9404002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9404029) 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, 5240 + ... + 6801.

It is an arithmetic number, because the mean of its divisors is an integer number (1300536).

Almost surely, 2^9404021 is an apocalyptic number.

It is an amenable number.

9404021 is a deficient number, since it is larger than the sum of its proper divisors (1000267).

9404021 is a wasteful number, since it uses less digits than its factorization.

9404021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12123.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 9404021 is about 3066.5976260344. The cubic root of 9404021 is about 211.0755178426.

The spelling of 9404021 in words is "nine million, four hundred four thousand, twenty-one".