2104866 has 48 divisors (see below), whose sum is σ = 4874688. Its totient is φ = 680400.

The previous prime is 2104859. The next prime is 2104867. The reversal of 2104866 is 6684012.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2104867) 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 23 ways as a sum of consecutive naturals, for example, 29611 + ... + 29681.

It is an arithmetic number, because the mean of its divisors is an integer number (101556).

2^2104866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2104866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2437344).

2104866 is an abundant number, since it is smaller than the sum of its proper divisors (2769822).

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

2104866 is an equidigital number, since it uses as much as digits as its factorization.

2104866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2104866 is about 1450.8156326701. The cubic root of 2104866 is about 128.1567496966.

Adding to 2104866 its reverse (6684012), we get a palindrome (8788878).

The spelling of 2104866 in words is "two million, one hundred four thousand, eight hundred sixty-six".