42443 has 2 divisors, whose sum is σ = 42444. Its totient is φ = 42442.

The previous prime is 42437. The next prime is 42451. The reversal of 42443 is 34424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42443 - 2⁶ = 42379 is a prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (42403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21221 + 21222.

It is an arithmetic number, because the mean of its divisors is an integer number (21222).

2⁴²⁴⁴³ is an apocalyptic number.

42443 is a deficient number, since it is larger than the sum of its proper divisors (1).

42443 is an equidigital number, since it uses as much as digits as its factorization.

42443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 17.

The square root of 42443 is about 206.0169895907. The cubic root of 42443 is about 34.8820519477.

Adding to 42443 its reverse (34424), we get a palindrome (76867).

The spelling of 42443 in words is "forty-two thousand, four hundred forty-three", and thus it is an iban number.