25889 has 2 divisors, whose sum is σ = 25890. Its totient is φ = 25888.

The previous prime is 25873. The next prime is 25903. The reversal of 25889 is 98852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25600 + 289 = 160^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 25889 - 2⁴ = 25873 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (25819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12944 + 12945.

It is an arithmetic number, because the mean of its divisors is an integer number (12945).

2²⁵⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

25889 is a deficient number, since it is larger than the sum of its proper divisors (1).

25889 is an equidigital number, since it uses as much as digits as its factorization.

25889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 32.

The square root of 25889 is about 160.9005904278. The cubic root of 25889 is about 29.5827419485.

Adding to 25889 its sum of digits (32), we get a square (25921 = 161²).

The spelling of 25889 in words is "twenty-five thousand, eight hundred eighty-nine".