43161 has 4 divisors (see below), whose sum is σ = 57552. Its totient is φ = 28772.

The previous prime is 43159. The next prime is 43177. The reversal of 43161 is 16134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43161 - 2¹ = 43159 is a prime.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 43161.

It is not an unprimeable number, because it can be changed into a prime (43151) 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 3 ways as a sum of consecutive naturals, for example, 7191 + ... + 7196.

It is an arithmetic number, because the mean of its divisors is an integer number (14388).

2⁴³¹⁶¹ is an apocalyptic number.

It is an amenable number.

43161 is a deficient number, since it is larger than the sum of its proper divisors (14391).

43161 is a wasteful number, since it uses less digits than its factorization.

43161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14390.

The product of its digits is 72, while the sum is 15.

The square root of 43161 is about 207.7522563054. The cubic root of 43161 is about 35.0776507266.

Adding to 43161 its reverse (16134), we get a palindrome (59295).

The spelling of 43161 in words is "forty-three thousand, one hundred sixty-one".