54865 has 4 divisors (see below), whose sum is σ = 65844. Its totient is φ = 43888.

The previous prime is 54851. The next prime is 54869. The reversal of 54865 is 56845.

54865 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: 56845 = 5 ⋅11369.

It can be written as a sum of positive squares in 2 ways, for example, as 25281 + 29584 = 159^2 + 172^2 .

It is a cyclic number.

It is not a de Polignac number, because 54865 - 2⁵ = 54833 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (54869) 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, 5482 + ... + 5491.

It is an arithmetic number, because the mean of its divisors is an integer number (16461).

2⁵⁴⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

54865 is a deficient number, since it is larger than the sum of its proper divisors (10979).

54865 is a wasteful number, since it uses less digits than its factorization.

54865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10978.

The product of its digits is 4800, while the sum is 28.

The square root of 54865 is about 234.2327901896. The cubic root of 54865 is about 37.9983840495.

It can be divided in two parts, 54 and 865, that added together give a palindrome (919).

The spelling of 54865 in words is "fifty-four thousand, eight hundred sixty-five".