43385 has 4 divisors (see below), whose sum is σ = 52068. Its totient is φ = 34704.

The previous prime is 43331. The next prime is 43391. The reversal of 43385 is 58334.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58334 = 2 ⋅29167.

It can be written as a sum of positive squares in 2 ways, for example, as 13456 + 29929 = 116^2 + 173^2 .

It is a cyclic number.

It is not a de Polignac number, because 43385 - 2⁶ = 43321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 43385.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4334 + ... + 4343.

It is an arithmetic number, because the mean of its divisors is an integer number (13017).

2⁴³³⁸⁵ is an apocalyptic number.

It is an amenable number.

43385 is a deficient number, since it is larger than the sum of its proper divisors (8683).

43385 is an equidigital number, since it uses as much as digits as its factorization.

43385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8682.

The product of its digits is 1440, while the sum is 23.

The square root of 43385 is about 208.2906622967. The cubic root of 43385 is about 35.1382288709.

The spelling of 43385 in words is "forty-three thousand, three hundred eighty-five".