25771 has 2 divisors, whose sum is σ = 25772. Its totient is φ = 25770.

The previous prime is 25763. The next prime is 25793. The reversal of 25771 is 17752.

It is an a-pointer prime, because the next prime (25793) can be obtained adding 25771 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25771 - 2³ = 25763 is a prime.

25771 is a lucky number.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (25741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12885 + 12886.

It is an arithmetic number, because the mean of its divisors is an integer number (12886).

2²⁵⁷⁷¹ is an apocalyptic number.

25771 is a deficient number, since it is larger than the sum of its proper divisors (1).

25771 is an equidigital number, since it uses as much as digits as its factorization.

25771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 490, while the sum is 22.

The square root of 25771 is about 160.5334856035. The cubic root of 25771 is about 29.5377282289.

Subtracting from 25771 its product of digits (490), we obtain a square (25281 = 159²).

The spelling of 25771 in words is "twenty-five thousand, seven hundred seventy-one".