25849 has 2 divisors, whose sum is σ = 25850. Its totient is φ = 25848.

The previous prime is 25847. The next prime is 25867. The reversal of 25849 is 94852.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14400 + 11449 = 120^2 + 107^2 .

It is a cyclic number.

It is not a de Polignac number, because 25849 - 2¹ = 25847 is a prime.

Together with 25847, it forms a pair of twin primes.

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, 12924 + 12925.

It is an arithmetic number, because the mean of its divisors is an integer number (12925).

2²⁵⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

25849 is a deficient number, since it is larger than the sum of its proper divisors (1).

25849 is an equidigital number, since it uses as much as digits as its factorization.

25849 is an odious number, because the sum of its binary digits is odd.

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

The square root of 25849 is about 160.7762420260. The cubic root of 25849 is about 29.5674984136.

The spelling of 25849 in words is "twenty-five thousand, eight hundred forty-nine".