65005 has 4 divisors (see below), whose sum is σ = 78012. Its totient is φ = 52000.

The previous prime is 65003. The next prime is 65011. The reversal of 65005 is 50056.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8836 + 56169 = 94^2 + 237^2 .

It is not a de Polignac number, because 65005 - 2¹ = 65003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6496 + ... + 6505.

It is an arithmetic number, because the mean of its divisors is an integer number (19503).

2⁶⁵⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

65005 is a deficient number, since it is larger than the sum of its proper divisors (13007).

65005 is a wasteful number, since it uses less digits than its factorization.

65005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13006.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 65005 is about 254.9607812978. The cubic root of 65005 is about 40.2082885148.

The spelling of 65005 in words is "sixty-five thousand, five".