4433421 has 4 divisors (see below), whose sum is σ = 5911232. Its totient is φ = 2955612.

The previous prime is 4433399. The next prime is 4433423. The reversal of 4433421 is 1243344.

Added to its reverse (1243344) it gives a triangular number (5676765 = T₃₃₆₉).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4433421 - 2¹³ = 4425229 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4433423) 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, 738901 + ... + 738906.

It is an arithmetic number, because the mean of its divisors is an integer number (1477808).

Almost surely, 2^4433421 is an apocalyptic number.

It is an amenable number.

4433421 is a deficient number, since it is larger than the sum of its proper divisors (1477811).

4433421 is a wasteful number, since it uses less digits than its factorization.

4433421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477810.

The product of its digits is 1152, while the sum is 21.

The square root of 4433421 is about 2105.5690442253. The cubic root of 4433421 is about 164.2780949928.

Adding to 4433421 its reverse (1243344), we get a palindrome (5676765).

The spelling of 4433421 in words is "four million, four hundred thirty-three thousand, four hundred twenty-one".