25918 has 4 divisors (see below), whose sum is σ = 38880. Its totient is φ = 12958.
The previous prime is 25913. The next prime is 25919. The reversal of 25918 is 81952.
It is a semiprime because it is the product of two primes.
It is a junction number, because it is equal to n+sod(n) for n = 25892 and 25901.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (25913) by changing a digit.
25918 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6478 + ... + 6481.
It is an arithmetic number, because the mean of its divisors is an integer number (9720).
225918 is an apocalyptic number.
25918 is a deficient number, since it is larger than the sum of its proper divisors (12962).
25918 is a wasteful number, since it uses less digits than its factorization.
25918 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 12961.
The product of its digits is 720, while the sum is 25.
The square root of 25918 is about 160.9906829602. The cubic root of 25918 is about 29.5937836958.
The spelling of 25918 in words is "twenty-five thousand, nine hundred eighteen".
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