25865 has 8 divisors (see below), whose sum is σ = 35520. Its totient is φ = 17712.
The previous prime is 25849. The next prime is 25867. The reversal of 25865 is 56852.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 25865 - 24 = 25849 is a prime.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25865.
It is not an unprimeable number, because it can be changed into a prime (25867) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335 + ... + 404.
It is an arithmetic number, because the mean of its divisors is an integer number (4440).
225865 is an apocalyptic number.
It is an amenable number.
25865 is a deficient number, since it is larger than the sum of its proper divisors (9655).
25865 is an equidigital number, since it uses as much as digits as its factorization.
25865 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 751.
The product of its digits is 2400, while the sum is 26.
The square root of 25865 is about 160.8259929240. The cubic root of 25865 is about 29.5735977134.
It can be divided in two parts, 258 and 65, that added together give a palindrome (323).
The spelling of 25865 in words is "twenty-five thousand, eight hundred sixty-five".
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