42442123 has 8 divisors (see below), whose sum is σ = 42867200. Its totient is φ = 42019560.

The previous prime is 42442097. The next prime is 42442129. The reversal of 42442123 is 32124424.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42442123 - 2²¹ = 40344971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42442094 and 42442103.

It is not an unprimeable number, because it can be changed into a prime (42442129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53536 + ... + 54322.

It is an arithmetic number, because the mean of its divisors is an integer number (5358400).

Almost surely, 2^42442123 is an apocalyptic number.

42442123 is a deficient number, since it is larger than the sum of its proper divisors (425077).

42442123 is a wasteful number, since it uses less digits than its factorization.

42442123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257.

The product of its digits is 1536, while the sum is 22.

The square root of 42442123 is about 6514.7619296487. The cubic root of 42442123 is about 348.8181169003.

Adding to 42442123 its reverse (32124424), we get a palindrome (74566547).

The spelling of 42442123 in words is "forty-two million, four hundred forty-two thousand, one hundred twenty-three".