43545 has 8 divisors (see below), whose sum is σ = 69696. Its totient is φ = 23216.

The previous prime is 43543. The next prime is 43573. The reversal of 43545 is 54534.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43545 - 2¹ = 43543 is a prime.

43545 is a lucky number.

It is a nialpdrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (43541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1437 + ... + 1466.

It is an arithmetic number, because the mean of its divisors is an integer number (8712).

2⁴³⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

43545 is a deficient number, since it is larger than the sum of its proper divisors (26151).

43545 is a wasteful number, since it uses less digits than its factorization.

43545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911.

The product of its digits is 1200, while the sum is 21.

The square root of 43545 is about 208.6743875036. The cubic root of 43545 is about 35.1813714275.

The spelling of 43545 in words is "forty-three thousand, five hundred forty-five".