42079 has 4 divisors (see below), whose sum is σ = 43560. Its totient is φ = 40600.

The previous prime is 42073. The next prime is 42083. The reversal of 42079 is 97024.

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

It is not a de Polignac number, because 42079 - 2³ = 42071 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42071) 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, 697 + ... + 754.

It is an arithmetic number, because the mean of its divisors is an integer number (10890).

2⁴²⁰⁷⁹ is an apocalyptic number.

42079 is a deficient number, since it is larger than the sum of its proper divisors (1481).

42079 is a wasteful number, since it uses less digits than its factorization.

42079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 42079 is about 205.1316650349. The cubic root of 42079 is about 34.7820469339.

Subtracting 42079 from its reverse (97024), we obtain a palindrome (54945).

The spelling of 42079 in words is "forty-two thousand, seventy-nine".