4430421 has 24 divisors (see below), whose sum is σ = 7076160. Its totient is φ = 2656896.

The previous prime is 4430411. The next prime is 4430431. The reversal of 4430421 is 1240344.

It is an interprime number because it is at equal distance from previous prime (4430411) and next prime (4430431).

It is not a de Polignac number, because 4430421 - 2¹⁴ = 4414037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4430394 and 4430403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4430411) 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 23 ways as a sum of consecutive naturals, for example, 2890 + ... + 4148.

It is an arithmetic number, because the mean of its divisors is an integer number (294840).

Almost surely, 2^4430421 is an apocalyptic number.

It is an amenable number.

4430421 is a deficient number, since it is larger than the sum of its proper divisors (2645739).

4430421 is a wasteful number, since it uses less digits than its factorization.

4430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305 (or 1302 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4430421 is about 2104.8565271771. The cubic root of 4430421 is about 164.2410321550.

Adding to 4430421 its reverse (1240344), we get a palindrome (5670765).

It can be divided in two parts, 4430 and 421, that added together give a triangular number (4851 = T₉₈).

The spelling of 4430421 in words is "four million, four hundred thirty thousand, four hundred twenty-one".