4443561 has 6 divisors (see below), whose sum is σ = 6418490. Its totient is φ = 2962368.

The previous prime is 4443559. The next prime is 4443563. The reversal of 4443561 is 1653444.

4443561 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4443559) and next prime (4443563).

It can be written as a sum of positive squares in only one way, i.e., 4161600 + 281961 = 2040^2 + 531^2 .

It is not a de Polignac number, because 4443561 - 2¹ = 4443559 is a prime.

It is a Duffinian number.

4443561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4443563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 246856 + ... + 246873.

Almost surely, 2^4443561 is an apocalyptic number.

It is an amenable number.

4443561 is a deficient number, since it is larger than the sum of its proper divisors (1974929).

4443561 is a wasteful number, since it uses less digits than its factorization.

4443561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493735 (or 493732 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 4443561 is about 2107.9755691184. The cubic root of 4443561 is about 164.4032437600.

It can be divided in two parts, 444 and 3561, that added together give a triangular number (4005 = T₈₉).

The spelling of 4443561 in words is "four million, four hundred forty-three thousand, five hundred sixty-one".