2005655 has 8 divisors (see below), whose sum is σ = 2415552. Its totient is φ = 1598688.

The previous prime is 2005613. The next prime is 2005667. The reversal of 2005655 is 5565002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2005655 - 2¹⁰ = 2004631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2005655.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1289 + ... + 2381.

It is an arithmetic number, because the mean of its divisors is an integer number (301944).

2^2005655 is an apocalyptic number.

2005655 is a deficient number, since it is larger than the sum of its proper divisors (409897).

2005655 is a wasteful number, since it uses less digits than its factorization.

2005655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 2005655 is about 1416.2114955048. The cubic root of 2005655 is about 126.1107408043.

The spelling of 2005655 in words is "two million, five thousand, six hundred fifty-five".