25847 has 2 divisors, whose sum is σ = 25848.
Its totient is φ = 25846.
The previous prime is 25841. The next prime is 25849. The reversal of 25847 is 74852.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 25847 - 212 = 21751 is a prime.
Together with 25849, it forms a pair of twin primes.
It is a Chen prime.
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 25847.
It is not a weakly prime, because it can be changed into another prime (25841) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12923 + 12924.
It is an arithmetic number, because the mean of its divisors is an integer number (12924).
225847 is an apocalyptic number.
25847 is a deficient number, since it is larger than the sum of its proper divisors (1).
25847 is an equidigital number, since it uses as much as digits as its factorization.
25847 is an evil number, because the sum of its binary digits is even.
The product of its digits is 2240, while the sum is 26.
The square root of 25847 is about 160.7700220812.
The cubic root of 25847 is about 29.5667358242.
The spelling of 25847 in words is "twenty-five thousand, eight hundred forty-seven".