2161043 has 4 divisors (see below), whose sum is σ = 2182128. Its totient is φ = 2139960.

The previous prime is 2161031. The next prime is 2161087. The reversal of 2161043 is 3401612.

2161043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2161043 - 2⁸ = 2160787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161343) 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 3 ways as a sum of consecutive naturals, for example, 10388 + ... + 10593.

It is an arithmetic number, because the mean of its divisors is an integer number (545532).

2^2161043 is an apocalyptic number.

2161043 is a deficient number, since it is larger than the sum of its proper divisors (21085).

2161043 is a wasteful number, since it uses less digits than its factorization.

2161043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21084.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2161043 is about 1470.0486386511. The cubic root of 2161043 is about 129.2868843074.

Adding to 2161043 its reverse (3401612), we get a palindrome (5562655).

The spelling of 2161043 in words is "two million, one hundred sixty-one thousand, forty-three".