605845 has 4 divisors (see below), whose sum is σ = 727020. Its totient is φ = 484672.

The previous prime is 605837. The next prime is 605849. The reversal of 605845 is 548506.

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 253009 + 352836 = 503^2 + 594^2 .

It is a cyclic number.

It is not a de Polignac number, because 605845 - 2³ = 605837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605849) 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, 60580 + ... + 60589.

It is an arithmetic number, because the mean of its divisors is an integer number (181755).

2⁶⁰⁵⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

605845 is a deficient number, since it is larger than the sum of its proper divisors (121175).

605845 is a wasteful number, since it uses less digits than its factorization.

605845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121174.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 605845 is about 778.3604563440. The cubic root of 605845 is about 84.6162632882.

It can be divided in two parts, 605 and 845, that multiplied together give a square (511225 = 715²).

The spelling of 605845 in words is "six hundred five thousand, eight hundred forty-five".