25489 has 4 divisors (see below), whose sum is σ = 25920. Its totient is φ = 25060.

The previous prime is 25471. The next prime is 25523. The reversal of 25489 is 98452.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25489 - 2⁵ = 25457 is a prime.

It is a Duffinian number.

25489 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (25409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109 + ... + 250.

It is an arithmetic number, because the mean of its divisors is an integer number (6480).

2²⁵⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

25489 is a deficient number, since it is larger than the sum of its proper divisors (431).

25489 is an equidigital number, since it uses as much as digits as its factorization.

25489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430.

The product of its digits is 2880, while the sum is 28.

The square root of 25489 is about 159.6527481755. The cubic root of 25489 is about 29.4295936608.

It can be divided in two parts, 254 and 89, that added together give a palindrome (343).

The spelling of 25489 in words is "twenty-five thousand, four hundred eighty-nine".