42065 has 8 divisors (see below), whose sum is σ = 51840. Its totient is φ = 32752.

The previous prime is 42061. The next prime is 42071. The reversal of 42065 is 56024.

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

It is a cyclic number.

It is not a de Polignac number, because 42065 - 2² = 42061 is a prime.

It is a Curzon number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (42061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146 + ... + 324.

It is an arithmetic number, because the mean of its divisors is an integer number (6480).

2⁴²⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

42065 is a deficient number, since it is larger than the sum of its proper divisors (9775).

42065 is a wasteful number, since it uses less digits than its factorization.

42065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 42065 is about 205.0975377717. The cubic root of 42065 is about 34.7781890897.

Adding to 42065 its reverse (56024), we get a palindrome (98089).

The spelling of 42065 in words is "forty-two thousand, sixty-five".