605921 has 2 divisors, whose sum is σ = 605922. Its totient is φ = 605920.

The previous prime is 605909. The next prime is 605933. The reversal of 605921 is 129506.

605921 is nontrivially palindromic in base 15.

It is a balanced prime because it is at equal distance from previous prime (605909) and next prime (605933).

It can be written as a sum of positive squares in only one way, i.e., 390625 + 215296 = 625^2 + 464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-605921 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon 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 605921.

It is not a weakly prime, because it can be changed into another prime (605021) 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, 302960 + 302961.

It is an arithmetic number, because the mean of its divisors is an integer number (302961).

2⁶⁰⁵⁹²¹ is an apocalyptic number.

It is an amenable number.

605921 is a deficient number, since it is larger than the sum of its proper divisors (1).

605921 is an equidigital number, since it uses as much as digits as its factorization.

605921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 605921 is about 778.4092753815. The cubic root of 605921 is about 84.6198013588.

The spelling of 605921 in words is "six hundred five thousand, nine hundred twenty-one".