538565 has 4 divisors (see below), whose sum is σ = 646284. Its totient is φ = 430848.

The previous prime is 538561. The next prime is 538567. The reversal of 538565 is 565835.

538565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565835 = 5 ⋅113167.

It can be written as a sum of positive squares in 2 ways, for example, as 391876 + 146689 = 626^2 + 383^2 .

It is a cyclic number.

It is not a de Polignac number, because 538565 - 2² = 538561 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538561) 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, 53852 + ... + 53861.

It is an arithmetic number, because the mean of its divisors is an integer number (161571).

2⁵³⁸⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

538565 is a deficient number, since it is larger than the sum of its proper divisors (107719).

538565 is a wasteful number, since it uses less digits than its factorization.

538565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107718.

The product of its digits is 18000, while the sum is 32.

The square root of 538565 is about 733.8698794746. The cubic root of 538565 is about 81.3603313728.

The spelling of 538565 in words is "five hundred thirty-eight thousand, five hundred sixty-five".