42422 has 4 divisors (see below), whose sum is σ = 63636. Its totient is φ = 21210.

The previous prime is 42409. The next prime is 42433. The reversal of 42422 is 22424.

It is a happy number.

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

It is a plaindrome in base 8.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 42397 and 42406.

It is a congruent number.

It is an unprimeable number.

42422 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10604 + ... + 10607.

It is an arithmetic number, because the mean of its divisors is an integer number (15909).

2⁴²⁴²² is an apocalyptic number.

42422 is a deficient number, since it is larger than the sum of its proper divisors (21214).

42422 is a wasteful number, since it uses less digits than its factorization.

42422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21213.

The product of its digits is 128, while the sum is 14.

The square root of 42422 is about 205.9660166144. The cubic root of 42422 is about 34.8762980037.

Adding to 42422 its sum of digits (14), we get a square (42436 = 206²).

Adding to 42422 its reverse (22424), we get a palindrome (64846).

It can be divided in two parts, 42 and 422, that added together give a palindrome (464).

The spelling of 42422 in words is "forty-two thousand, four hundred twenty-two", and thus it is an iban number.