4644021 has 8 divisors (see below), whose sum is σ = 6203520. Its totient is φ = 3090272.

The previous prime is 4644011. The next prime is 4644053. The reversal of 4644021 is 1204464.

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 4644021 - 2¹⁰ = 4642997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4644001) 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 7 ways as a sum of consecutive naturals, for example, 1081 + ... + 3233.

It is an arithmetic number, because the mean of its divisors is an integer number (775440).

Almost surely, 2^4644021 is an apocalyptic number.

It is an amenable number.

4644021 is a deficient number, since it is larger than the sum of its proper divisors (1559499).

4644021 is a wasteful number, since it uses less digits than its factorization.

4644021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 4644021 is about 2154.9990719256. Note that the first 3 decimals coincide. The cubic root of 4644021 is about 166.8391844751.

Adding to 4644021 its reverse (1204464), we get a palindrome (5848485).

The spelling of 4644021 in words is "four million, six hundred forty-four thousand, twenty-one".