42668 has 6 divisors (see below), whose sum is σ = 74676.
Its totient is φ = 21332.
The previous prime is 42667. The next prime is 42677. The reversal of 42668 is 86624.
Subtracting 42668 from its reverse (86624), we obtain a triangular number (43956 = T296).
It can be divided in two parts, 426 and 68, that added together give a palindrome (494).
42668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a plaindrome in base 14.
It is a nialpdrome in base 15.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 42668.
It is not an unprimeable number, because it can be changed into a prime (42667) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5330 + ... + 5337.
It is an arithmetic number, because the mean of its divisors is an integer number (12446).
242668 is an apocalyptic number.
It is an amenable number.
42668 is a deficient number, since it is larger than the sum of its proper divisors (32008).
42668 is a wasteful number, since it uses less digits than its factorization.
42668 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 10671 (or 10669 counting only the distinct ones).
The product of its digits is 2304, while the sum is 26.
The square root of 42668 is about 206.5623392586.
The cubic root of 42668 is about 34.9435825775.
The spelling of 42668 in words is "forty-two thousand, six hundred sixty-eight".