43995 has 16 divisors (see below), whose sum is σ = 80640.
Its totient is φ = 20064.
The previous prime is 43991. The next prime is 43997. The reversal of 43995 is 59934.
It is not a de Polignac number, because 43995 - 22 = 43991 is a prime.
43995 is a lucky number.
It is not an unprimeable number, because it can be changed into a prime (43991) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105 + ... + 314.
It is an arithmetic number, because the mean of its divisors is an integer number (5040).
243995 is an apocalyptic number.
43995 is a deficient number, since it is larger than the sum of its proper divisors (36645).
43995 is a wasteful number, since it uses less digits than its factorization.
43995 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 434.
The product of its digits is 4860, while the sum is 30.
The square root of 43995 is about 209.7498510131.
The cubic root of 43995 is about 35.3021460494.
The spelling of 43995 in words is "forty-three thousand, nine hundred ninety-five".