4543021 has 8 divisors (see below), whose sum is σ = 5243264. Its totient is φ = 3855600.

The previous prime is 4543013. The next prime is 4543031. The reversal of 4543021 is 1203454.

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

It is not a de Polignac number, because 4543021 - 2³ = 4543013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4543021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4543031) 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, 2430 + ... + 3871.

It is an arithmetic number, because the mean of its divisors is an integer number (655408).

Almost surely, 2^4543021 is an apocalyptic number.

It is an amenable number.

4543021 is a deficient number, since it is larger than the sum of its proper divisors (700243).

4543021 is a wasteful number, since it uses less digits than its factorization.

4543021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6411.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 4543021 is about 2131.4363701504. The cubic root of 4543021 is about 165.6208139917.

Adding to 4543021 its reverse (1203454), we get a palindrome (5746475).

It can be divided in two parts, 45430 and 21, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 4543021 in words is "four million, five hundred forty-three thousand, twenty-one".