42442 has 4 divisors (see below), whose sum is σ = 63666. Its totient is φ = 21220.

The previous prime is 42437. The next prime is 42443. The reversal of 42442 is 24424.

42442 is nontrivially palindromic in base 5.

42442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 25281 + 17161 = 159^2 + 131^2 .

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (42443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10609 + ... + 10612.

2⁴²⁴⁴² is an apocalyptic number.

42442 is a deficient number, since it is larger than the sum of its proper divisors (21224).

42442 is a wasteful number, since it uses less digits than its factorization.

42442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21223.

The product of its digits is 256, while the sum is 16.

The square root of 42442 is about 206.0145625921. The cubic root of 42442 is about 34.8817779934.

Adding to 42442 its reverse (24424), we get a palindrome (66866).

It can be divided in two parts, 42 and 442, that added together give a palindrome (484).

The spelling of 42442 in words is "forty-two thousand, four hundred forty-two", and thus it is an iban number.