2443121 has 8 divisors (see below), whose sum is σ = 2608200. Its totient is φ = 2280448.

The previous prime is 2443117. The next prime is 2443151. The reversal of 2443121 is 1213442.

2443121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1311025 + 1132096 = 1145^2 + 1064^2 .

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

It is not a de Polignac number, because 2443121 - 2² = 2443117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2443121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2443151) 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 7 ways as a sum of consecutive naturals, for example, 1805 + ... + 2853.

It is an arithmetic number, because the mean of its divisors is an integer number (326025).

2^2443121 is an apocalyptic number.

It is an amenable number.

2443121 is a deficient number, since it is larger than the sum of its proper divisors (165079).

2443121 is a wasteful number, since it uses less digits than its factorization.

2443121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203.

The product of its digits is 192, while the sum is 17.

The square root of 2443121 is about 1563.0486236839. The cubic root of 2443121 is about 134.6836855867.

Adding to 2443121 its reverse (1213442), we get a palindrome (3656563).

The spelling of 2443121 in words is "two million, four hundred forty-three thousand, one hundred twenty-one".