2001443 has 4 divisors (see below), whose sum is σ = 2007720. Its totient is φ = 1995168.

The previous prime is 2001421. The next prime is 2001449. The reversal of 2001443 is 3441002.

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

It is a cyclic number.

It is not a de Polignac number, because 2001443 - 2¹⁶ = 1935907 is a prime.

It is a Duffinian number.

2001443 is a modest number, since divided by 1443 gives 2 as remainder.

It is not an unprimeable number, because it can be changed into a prime (2001449) 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, 2633 + ... + 3306.

It is an arithmetic number, because the mean of its divisors is an integer number (501930).

2^2001443 is an apocalyptic number.

2001443 is a deficient number, since it is larger than the sum of its proper divisors (6277).

2001443 is an equidigital number, since it uses as much as digits as its factorization.

2001443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6276.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2001443 is about 1414.7236479256. The cubic root of 2001443 is about 126.0223988062.

Adding to 2001443 its reverse (3441002), we get a palindrome (5442445).

The spelling of 2001443 in words is "two million, one thousand, four hundred forty-three".