4550021 has 16 divisors (see below), whose sum is σ = 5529600. Its totient is φ = 3659568.

The previous prime is 4550011. The next prime is 4550027. The reversal of 4550021 is 1200554.

It is a cyclic number.

It is not a de Polignac number, because 4550021 - 2⁶ = 4549957 is a prime.

It is a super-2 number, since 2×4550021² = 41405382200882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4550027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9260 + ... + 9738.

It is an arithmetic number, because the mean of its divisors is an integer number (345600).

Almost surely, 2^4550021 is an apocalyptic number.

It is an amenable number.

4550021 is a deficient number, since it is larger than the sum of its proper divisors (979579).

4550021 is a wasteful number, since it uses less digits than its factorization.

4550021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 4550021 is about 2133.0778232404. The cubic root of 4550021 is about 165.7058345656.

Adding to 4550021 its reverse (1200554), we get a palindrome (5750575).

The spelling of 4550021 in words is "four million, five hundred fifty thousand, twenty-one".