42479 has 4 divisors (see below), whose sum is σ = 42984. Its totient is φ = 41976.

The previous prime is 42473. The next prime is 42487. The reversal of 42479 is 97424.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42479 - 2⁴ = 42463 is a prime.

It is a Duffinian number.

Its product of digits (2016) is a multiple of the sum of its prime divisors (504).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92 + ... + 305.

It is an arithmetic number, because the mean of its divisors is an integer number (10746).

2⁴²⁴⁷⁹ is an apocalyptic number.

42479 is a deficient number, since it is larger than the sum of its proper divisors (505).

42479 is a wasteful number, since it uses less digits than its factorization.

42479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504.

The product of its digits is 2016, while the sum is 26.

The square root of 42479 is about 206.1043425064. The cubic root of 42479 is about 34.8919114377.

Subtracting 42479 from its reverse (97424), we obtain a palindrome (54945).

The spelling of 42479 in words is "forty-two thousand, four hundred seventy-nine".