2143865 has 8 divisors (see below), whose sum is σ = 2708160. Its totient is φ = 1624752.

The previous prime is 2143861. The next prime is 2143873. The reversal of 2143865 is 5683412.

2143865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2143865 - 2² = 2143861 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 1 + 4⁶ + 3¹¹ + 8 + 6⁴ + 5⁹ .

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2143861) 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, 11189 + ... + 11378.

It is an arithmetic number, because the mean of its divisors is an integer number (338520).

2^2143865 is an apocalyptic number.

It is an amenable number.

2143865 is a deficient number, since it is larger than the sum of its proper divisors (564295).

2143865 is a wasteful number, since it uses less digits than its factorization.

2143865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22591.

The product of its digits is 5760, while the sum is 29.

The square root of 2143865 is about 1464.1943177051. The cubic root of 2143865 is about 128.9434080636.

The spelling of 2143865 in words is "two million, one hundred forty-three thousand, eight hundred sixty-five".