2105636 has 12 divisors (see below), whose sum is σ = 3968412. Its totient is φ = 971808.

The previous prime is 2105611. The next prime is 2105641. The reversal of 2105636 is 6365012.

2105636 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 2 ways, for example, as 256036 + 1849600 = 506^2 + 1360^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20195 + ... + 20298.

It is an arithmetic number, because the mean of its divisors is an integer number (330701).

2^2105636 is an apocalyptic number.

2105636 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2105636 is a deficient number, since it is larger than the sum of its proper divisors (1862776).

2105636 is a wasteful number, since it uses less digits than its factorization.

2105636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40510 (or 40508 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2105636 is about 1451.0809763759. The cubic root of 2105636 is about 128.1723751833.

The spelling of 2105636 in words is "two million, one hundred five thousand, six hundred thirty-six".