27505 has 4 divisors (see below), whose sum is σ = 33012. Its totient is φ = 22000.

The previous prime is 27487. The next prime is 27509. The reversal of 27505 is 50572.

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 20449 + 7056 = 143^2 + 84^2 .

It is not a de Polignac number, because 27505 - 2⁹ = 26993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27509) 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, 2746 + ... + 2755.

It is an arithmetic number, because the mean of its divisors is an integer number (8253).

2²⁷⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

27505 is a deficient number, since it is larger than the sum of its proper divisors (5507).

27505 is an equidigital number, since it uses as much as digits as its factorization.

27505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5506.

The product of its (nonzero) digits is 350, while the sum is 19.

The square root of 27505 is about 165.8463143998. The cubic root of 27505 is about 30.1858829097.

The spelling of 27505 in words is "twenty-seven thousand, five hundred five".