42544123 has 4 divisors (see below), whose sum is σ = 43143408. Its totient is φ = 41944840.

The previous prime is 42544109. The next prime is 42544127. The reversal of 42544123 is 32144524.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42544123 - 2⁵ = 42544091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42544127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299536 + ... + 299677.

It is an arithmetic number, because the mean of its divisors is an integer number (10785852).

Almost surely, 2^42544123 is an apocalyptic number.

42544123 is a deficient number, since it is larger than the sum of its proper divisors (599285).

42544123 is an equidigital number, since it uses as much as digits as its factorization.

42544123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599284.

The product of its digits is 3840, while the sum is 25.

The square root of 42544123 is about 6522.5856069507. The cubic root of 42544123 is about 349.0973283773.

Adding to 42544123 its reverse (32144524), we get a palindrome (74688647).

The spelling of 42544123 in words is "forty-two million, five hundred forty-four thousand, one hundred twenty-three".