42827 has 4 divisors (see below), whose sum is σ = 43320. Its totient is φ = 42336.

The previous prime is 42821. The next prime is 42829. The reversal of 42827 is 72824.

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 42827 - 2⁸ = 42571 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (42821) 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, 77 + ... + 302.

It is an arithmetic number, because the mean of its divisors is an integer number (10830).

2⁴²⁸²⁷ is an apocalyptic number.

42827 is a deficient number, since it is larger than the sum of its proper divisors (493).

42827 is a wasteful number, since it uses less digits than its factorization.

42827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its digits is 896, while the sum is 23.

The square root of 42827 is about 206.9468530807. The cubic root of 42827 is about 34.9869338983.

The spelling of 42827 in words is "forty-two thousand, eight hundred twenty-seven".