2105998 has 16 divisors (see below), whose sum is σ = 3355920. Its totient is φ = 988416.

The previous prime is 2105993. The next prime is 2106019. The reversal of 2105998 is 8995012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105993) 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 7 ways as a sum of consecutive naturals, for example, 5790 + ... + 6142.

It is an arithmetic number, because the mean of its divisors is an integer number (209745).

2^2105998 is an apocalyptic number.

2105998 is a deficient number, since it is larger than the sum of its proper divisors (1249922).

2105998 is a wasteful number, since it uses less digits than its factorization.

2105998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 2105998 is about 1451.2057056117. The cubic root of 2105998 is about 128.1797198749.

The spelling of 2105998 in words is "two million, one hundred five thousand, nine hundred ninety-eight".