2165441 has 4 divisors (see below), whose sum is σ = 2178132. Its totient is φ = 2152752.

The previous prime is 2165413. The next prime is 2165453. The reversal of 2165441 is 1445612.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2002225 + 163216 = 1415^2 + 404^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165441 - 2¹⁰ = 2164417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2165461) 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, 6086 + ... + 6431.

It is an arithmetic number, because the mean of its divisors is an integer number (544533).

2^2165441 is an apocalyptic number.

It is an amenable number.

2165441 is a deficient number, since it is larger than the sum of its proper divisors (12691).

2165441 is a wasteful number, since it uses less digits than its factorization.

2165441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12690.

The product of its digits is 960, while the sum is 23.

The square root of 2165441 is about 1471.5437472260. The cubic root of 2165441 is about 129.3745300146.

The spelling of 2165441 in words is "two million, one hundred sixty-five thousand, four hundred forty-one".