4429021 has 4 divisors (see below), whose sum is σ = 4438044. Its totient is φ = 4420000.

The previous prime is 4428971. The next prime is 4429031. The reversal of 4429021 is 1209244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 765625 + 3663396 = 875^2 + 1914^2 .

It is a cyclic number.

It is not a de Polignac number, because 4429021 - 2⁹ = 4428509 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4428983 and 4429001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4429031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3730 + ... + 4771.

It is an arithmetic number, because the mean of its divisors is an integer number (1109511).

Almost surely, 2^4429021 is an apocalyptic number.

It is an amenable number.

4429021 is a deficient number, since it is larger than the sum of its proper divisors (9023).

4429021 is an equidigital number, since it uses as much as digits as its factorization.

4429021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9022.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 4429021 is about 2104.5239366660. The cubic root of 4429021 is about 164.2237304381.

It can be divided in two parts, 4 and 429021, that added together give a square (429025 = 655²).

The spelling of 4429021 in words is "four million, four hundred twenty-nine thousand, twenty-one".