54785 has 4 divisors (see below), whose sum is σ = 65748. Its totient is φ = 43824.

The previous prime is 54779. The next prime is 54787. The reversal of 54785 is 58745.

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 26896 + 27889 = 164^2 + 167^2 .

It is a cyclic number.

It is not a de Polignac number, because 54785 - 2⁶ = 54721 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 54785.

It is not an unprimeable number, because it can be changed into a prime (54787) 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, 5474 + ... + 5483.

It is an arithmetic number, because the mean of its divisors is an integer number (16437).

It is a Proth number, since it is equal to 107 ⋅ 2⁹ + 1 and 107 < 2⁹.

2⁵⁴⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

54785 is a deficient number, since it is larger than the sum of its proper divisors (10963).

54785 is a wasteful number, since it uses less digits than its factorization.

54785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10962.

The product of its digits is 5600, while the sum is 29.

The square root of 54785 is about 234.0619576095. The cubic root of 54785 is about 37.9799062742.

Subtracting from 54785 its sum of digits (29), we obtain a square (54756 = 234²).

The spelling of 54785 in words is "fifty-four thousand, seven hundred eighty-five".