120565 has 4 divisors (see below), whose sum is σ = 144684. Its totient is φ = 96448.

The previous prime is 120563. The next prime is 120569. The reversal of 120565 is 565021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565021 = 41 ⋅13781.

It can be written as a sum of positive squares in 2 ways, for example, as 62001 + 58564 = 249^2 + 242^2 .

It is a cyclic number.

It is not a de Polignac number, because 120565 - 2¹ = 120563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120563) 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, 12052 + ... + 12061.

It is an arithmetic number, because the mean of its divisors is an integer number (36171).

2¹²⁰⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

120565 is a deficient number, since it is larger than the sum of its proper divisors (24119).

120565 is an equidigital number, since it uses as much as digits as its factorization.

120565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24118.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 120565 is about 347.2247111022. The cubic root of 120565 is about 49.4015319669.

Adding to 120565 its reverse (565021), we get a palindrome (685586).

The spelling of 120565 in words is "one hundred twenty thousand, five hundred sixty-five".