2105506 has 16 divisors (see below), whose sum is σ = 3475584. Its totient is φ = 950544.

The previous prime is 2105503. The next prime is 2105507. The reversal of 2105506 is 6055012.

It is a happy number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2105503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361 + ... + 2083.

It is an arithmetic number, because the mean of its divisors is an integer number (217224).

2^2105506 is an apocalyptic number.

2105506 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2105506 is a deficient number, since it is larger than the sum of its proper divisors (1370078).

2105506 is a wasteful number, since it uses less digits than its factorization.

2105506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 2105506 is about 1451.0361814924. The cubic root of 2105506 is about 128.1697373814.

The spelling of 2105506 in words is "two million, one hundred five thousand, five hundred six".