605305 has 4 divisors (see below), whose sum is σ = 726372. Its totient is φ = 484240.

The previous prime is 605261. The next prime is 605309. The reversal of 605305 is 503506.

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 331776 + 273529 = 576^2 + 523^2 .

It is not a de Polignac number, because 605305 - 2⁷ = 605177 is a prime.

It is a Duffinian number.

605305 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (605309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60526 + ... + 60535.

It is an arithmetic number, because the mean of its divisors is an integer number (181593).

2⁶⁰⁵³⁰⁵ is an apocalyptic number.

It is an amenable number.

605305 is a deficient number, since it is larger than the sum of its proper divisors (121067).

605305 is a wasteful number, since it uses less digits than its factorization.

605305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121066.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 605305 is about 778.0134960269. The cubic root of 605305 is about 84.5911158415.

The spelling of 605305 in words is "six hundred five thousand, three hundred five".