2143189 has 4 divisors (see below), whose sum is σ = 2148300. Its totient is φ = 2138080.

The previous prime is 2143177. The next prime is 2143199. The reversal of 2143189 is 9813412.

It is a happy number.

2143189 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 can be written as a sum of positive squares in 2 ways, for example, as 1542564 + 600625 = 1242^2 + 775^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143189 - 2⁵ = 2143157 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143109) 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, 1864 + ... + 2785.

It is an arithmetic number, because the mean of its divisors is an integer number (537075).

2^2143189 is an apocalyptic number.

It is an amenable number.

2143189 is a deficient number, since it is larger than the sum of its proper divisors (5111).

2143189 is an equidigital number, since it uses as much as digits as its factorization.

2143189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110.

The product of its digits is 1728, while the sum is 28.

The square root of 2143189 is about 1463.9634558280. The cubic root of 2143189 is about 128.9298538974.

It can be divided in two parts, 2143 and 189, that added together give a palindrome (2332).

The spelling of 2143189 in words is "two million, one hundred forty-three thousand, one hundred eighty-nine".