42806 has 8 divisors (see below), whose sum is σ = 68040. Its totient is φ = 20128.

The previous prime is 42797. The next prime is 42821. The reversal of 42806 is 60824.

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

It is a plaindrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596 + ... + 663.

It is an arithmetic number, because the mean of its divisors is an integer number (8505).

2⁴²⁸⁰⁶ is an apocalyptic number.

42806 is a deficient number, since it is larger than the sum of its proper divisors (25234).

42806 is a wasteful number, since it uses less digits than its factorization.

42806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 42806 is about 206.8961091949. The cubic root of 42806 is about 34.9812144088.

It can be divided in two parts, 42 and 806, that added together give a palindrome (848).

The spelling of 42806 in words is "forty-two thousand, eight hundred six".