1305589 has 2 divisors, whose sum is σ = 1305590. Its totient is φ = 1305588.

The previous prime is 1305587. The next prime is 1305593. The reversal of 1305589 is 9855031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 731025 + 574564 = 855^2 + 758^2 .

It is an emirp because it is prime and its reverse (9855031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1305589 - 2¹ = 1305587 is a prime.

Together with 1305587, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1305589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652794 + 652795.

It is an arithmetic number, because the mean of its divisors is an integer number (652795).

2^1305589 is an apocalyptic number.

It is an amenable number.

1305589 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305589 is an equidigital number, since it uses as much as digits as its factorization.

1305589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1305589 is about 1142.6237350939. The cubic root of 1305589 is about 109.2954696950.

The spelling of 1305589 in words is "one million, three hundred five thousand, five hundred eighty-nine".