605861 has 2 divisors, whose sum is σ = 605862. Its totient is φ = 605860.

The previous prime is 605849. The next prime is 605867. The reversal of 605861 is 168506.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504100 + 101761 = 710^2 + 319^2 .

It is a cyclic number.

It is not a de Polignac number, because 605861 - 2¹⁰ = 604837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 605861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (605867) 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 as a sum of consecutive naturals, namely, 302930 + 302931.

It is an arithmetic number, because the mean of its divisors is an integer number (302931).

2⁶⁰⁵⁸⁶¹ is an apocalyptic number.

It is an amenable number.

605861 is a deficient number, since it is larger than the sum of its proper divisors (1).

605861 is an equidigital number, since it uses as much as digits as its factorization.

605861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 605861 is about 778.3707342905. The cubic root of 605861 is about 84.6170081697.

The spelling of 605861 in words is "six hundred five thousand, eight hundred sixty-one".