25718 has 16 divisors (see below), whose sum is σ = 48384. Its totient is φ = 9960.

The previous prime is 25717. The next prime is 25733. The reversal of 25718 is 81752.

It is a super-3 number, since 3×25718³ = 51030853338696, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 25693 and 25702.

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 7 ways as a sum of consecutive naturals, for example, 71 + ... + 237.

It is an arithmetic number, because the mean of its divisors is an integer number (3024).

2²⁵⁷¹⁸ is an apocalyptic number.

25718 is a deficient number, since it is larger than the sum of its proper divisors (22666).

25718 is a wasteful number, since it uses less digits than its factorization.

25718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187.

The product of its digits is 560, while the sum is 23.

The square root of 25718 is about 160.3683260498. The cubic root of 25718 is about 29.5174654786.

The spelling of 25718 in words is "twenty-five thousand, seven hundred eighteen".