2143866 has 16 divisors (see below), whose sum is σ = 4352544. Its totient is φ = 703824.

The previous prime is 2143861. The next prime is 2143873. The reversal of 2143866 is 6683412.

2143866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2143866² = 9192322851912, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 4² + 3³ + 8 + 6 + 6⁶ .

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, 2265 + ... + 3068.

It is an arithmetic number, because the mean of its divisors is an integer number (272034).

2^2143866 is an apocalyptic number.

2143866 is an abundant number, since it is smaller than the sum of its proper divisors (2208678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2143866 is a wasteful number, since it uses less digits than its factorization.

2143866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5405.

The product of its digits is 6912, while the sum is 30.

The square root of 2143866 is about 1464.1946591898. The cubic root of 2143866 is about 128.9434281120.

The spelling of 2143866 in words is "two million, one hundred forty-three thousand, eight hundred sixty-six".