4421345 has 4 divisors (see below), whose sum is σ = 5305620. Its totient is φ = 3537072.

The previous prime is 4421323. The next prime is 4421353. The reversal of 4421345 is 5431244.

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 2505889 + 1915456 = 1583^2 + 1384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4421345 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4421345.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442130 + ... + 442139.

It is an arithmetic number, because the mean of its divisors is an integer number (1326405).

Almost surely, 2^4421345 is an apocalyptic number.

It is an amenable number.

4421345 is a deficient number, since it is larger than the sum of its proper divisors (884275).

4421345 is an equidigital number, since it uses as much as digits as its factorization.

4421345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884274.

The product of its digits is 1920, while the sum is 23.

The square root of 4421345 is about 2102.6994554620. The cubic root of 4421345 is about 164.1288027403.

Adding to 4421345 its reverse (5431244), we get a palindrome (9852589).

The spelling of 4421345 in words is "four million, four hundred twenty-one thousand, three hundred forty-five".