25171 has 2 divisors, whose sum is σ = 25172. Its totient is φ = 25170.

The previous prime is 25169. The next prime is 25183. The reversal of 25171 is 17152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25171 - 2¹ = 25169 is a prime.

Together with 25169, it forms a pair of twin primes.

It is an Ulam number.

25171 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (25111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12585 + 12586.

It is an arithmetic number, because the mean of its divisors is an integer number (12586).

2²⁵¹⁷¹ is an apocalyptic number.

25171 is a deficient number, since it is larger than the sum of its proper divisors (1).

25171 is an equidigital number, since it uses as much as digits as its factorization.

25171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70, while the sum is 16.

The square root of 25171 is about 158.6537109557. The cubic root of 25171 is about 29.3066935594.

It can be divided in two parts, 25 and 171, that added together give a square (196 = 14²).

The spelling of 25171 in words is "twenty-five thousand, one hundred seventy-one".