25589 has 2 divisors, whose sum is σ = 25590.
Its totient is φ = 25588.
The previous prime is 25583. The next prime is 25601. The reversal of 25589 is 98552.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 24964 + 625 = 158^2 + 25^2
It is a cyclic number.
It is not a de Polignac number, because 25589 - 212 = 21493 is a prime.
It is a Chen prime.
It is a plaindrome in base 10 and base 15.
It is a nialpdrome in base 13.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (25583) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12794 + 12795.
It is an arithmetic number, because the mean of its divisors is an integer number (12795).
225589 is an apocalyptic number.
It is an amenable number.
25589 is a deficient number, since it is larger than the sum of its proper divisors (1).
25589 is an equidigital number, since it uses as much as digits as its factorization.
25589 is an evil number, because the sum of its binary digits is even.
The product of its digits is 3600, while the sum is 29.
The square root of 25589 is about 159.9656213066.
The cubic root of 25589 is about 29.4680300983.
The spelling of 25589 in words is "twenty-five thousand, five hundred eighty-nine".