It is a semiprime because it is the product of two primes.
It is an Ulam number.
It is a nialpdrome in base 13.
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 25406.
225406 is an apocalyptic number.
25406 is a wasteful number, since it uses less digits than its factorization.
25406 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 12705.
The square root of 25406 is about 159.3925970677. The cubic root of 25406 is about 29.3976149977.
Adding to 25406 its reverse (60452), we get a palindrome (85858).
The spelling of 25406 in words is "twenty-five thousand, four hundred six".