25711 has 4 divisors (see below), whose sum is σ = 29392.
Its totient is φ = 22032.
The previous prime is 25703. The next prime is 25717. The reversal of 25711 is 11752.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 25711 - 23 = 25703 is a prime.
It is a super-2 number, since 2×257112 = 1322111042, which contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (25717) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1830 + ... + 1843.
It is an arithmetic number, because the mean of its divisors is an integer number (7348).
225711 is an apocalyptic number.
25711 is a deficient number, since it is larger than the sum of its proper divisors (3681).
25711 is an equidigital number, since it uses as much as digits as its factorization.
25711 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3680.
The product of its digits is 70, while the sum is 16.
The square root of 25711 is about 160.3464998059.
The cubic root of 25711 is about 29.5147871858.
The spelling of 25711 in words is "twenty-five thousand, seven hundred eleven".