605891 has 16 divisors (see below), whose sum is σ = 752640. Its totient is φ = 479520.

The previous prime is 605887. The next prime is 605893. The reversal of 605891 is 198506.

It is a cyclic number.

It is not a de Polignac number, because 605891 - 2² = 605887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 605891.

It is not an unprimeable number, because it can be changed into a prime (605893) 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 15 ways as a sum of consecutive naturals, for example, 2606 + ... + 2828.

It is an arithmetic number, because the mean of its divisors is an integer number (47040).

2⁶⁰⁵⁸⁹¹ is an apocalyptic number.

605891 is a deficient number, since it is larger than the sum of its proper divisors (146749).

605891 is a wasteful number, since it uses less digits than its factorization.

605891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 605891 is about 778.3900050746. The cubic root of 605891 is about 84.6184047873.

The spelling of 605891 in words is "six hundred five thousand, eight hundred ninety-one".