42766 has 4 divisors (see below), whose sum is σ = 64152. Its totient is φ = 21382.

The previous prime is 42751. The next prime is 42767. The reversal of 42766 is 66724.

42766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 42766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10690 + ... + 10693.

It is an arithmetic number, because the mean of its divisors is an integer number (16038).

2⁴²⁷⁶⁶ is an apocalyptic number.

42766 is a deficient number, since it is larger than the sum of its proper divisors (21386).

42766 is a wasteful number, since it uses less digits than its factorization.

42766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21385.

The product of its digits is 2016, while the sum is 25.

The square root of 42766 is about 206.7994197284. The cubic root of 42766 is about 34.9703149660.

It can be divided in two parts, 427 and 66, that multiplied together give a palindrome (28182).

The spelling of 42766 in words is "forty-two thousand, seven hundred sixty-six".