2142443 has 4 divisors (see below), whose sum is σ = 2155440. Its totient is φ = 2129448.

The previous prime is 2142431. The next prime is 2142449. The reversal of 2142443 is 3442412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142449) 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, 6248 + ... + 6581.

It is an arithmetic number, because the mean of its divisors is an integer number (538860).

2^2142443 is an apocalyptic number.

2142443 is a deficient number, since it is larger than the sum of its proper divisors (12997).

2142443 is a wasteful number, since it uses less digits than its factorization.

2142443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12996.

The product of its digits is 768, while the sum is 20.

The square root of 2142443 is about 1463.7086458718. The cubic root of 2142443 is about 128.9148928848.

Adding to 2142443 its reverse (3442412), we get a palindrome (5584855).

The spelling of 2142443 in words is "two million, one hundred forty-two thousand, four hundred forty-three".