2005505 has 4 divisors (see below), whose sum is σ = 2406612. Its totient is φ = 1604400.

The previous prime is 2005499. The next prime is 2005519. The reversal of 2005505 is 5055002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 369664 + 1635841 = 608^2 + 1279^2 .

It is not a de Polignac number, because 2005505 - 2⁴ = 2005489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200546 + ... + 200555.

It is an arithmetic number, because the mean of its divisors is an integer number (601653).

2^2005505 is an apocalyptic number.

It is an amenable number.

2005505 is a deficient number, since it is larger than the sum of its proper divisors (401107).

2005505 is an equidigital number, since it uses as much as digits as its factorization.

2005505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401106.

The product of its (nonzero) digits is 250, while the sum is 17.

The square root of 2005505 is about 1416.1585363228. The cubic root of 2005505 is about 126.1075968468.

The spelling of 2005505 in words is "two million, five thousand, five hundred five".