2001442 has 4 divisors (see below), whose sum is σ = 3002166. Its totient is φ = 1000720.

The previous prime is 2001421. The next prime is 2001449. The reversal of 2001442 is 2441002.

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

It can be written as a sum of positive squares in only one way, i.e., 1879641 + 121801 = 1371^2 + 349^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 as a sum of consecutive naturals, namely, 500359 + ... + 500362.

2^2001442 is an apocalyptic number.

2001442 is a deficient number, since it is larger than the sum of its proper divisors (1000724).

2001442 is a wasteful number, since it uses less digits than its factorization.

2001442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000723.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2001442 is about 1414.7232944997. The cubic root of 2001442 is about 126.0223778176.

Adding to 2001442 its reverse (2441002), we get a palindrome (4442444).

The spelling of 2001442 in words is "two million, one thousand, four hundred forty-two".