43546 has 4 divisors (see below), whose sum is σ = 65322. Its totient is φ = 21772.

The previous prime is 43543. The next prime is 43573. The reversal of 43546 is 64534.

43546 is an esthetic number in base 9, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42025 + 1521 = 205^2 + 39^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 as a sum of consecutive naturals, namely, 10885 + ... + 10888.

2⁴³⁵⁴⁶ is an apocalyptic number.

43546 is a deficient number, since it is larger than the sum of its proper divisors (21776).

43546 is a wasteful number, since it uses less digits than its factorization.

43546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21775.

The product of its digits is 1440, while the sum is 22.

The square root of 43546 is about 208.6767835673. The cubic root of 43546 is about 35.1816407359.

The spelling of 43546 in words is "forty-three thousand, five hundred forty-six".