25719 has 4 divisors (see below), whose sum is σ = 34296. Its totient is φ = 17144.

The previous prime is 25717. The next prime is 25733. The reversal of 25719 is 91752.

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 25719 - 2¹ = 25717 is a prime.

It is a super-2 number, since 2×25719² = 1322933922, which contains 22 as substring.

It is a D-number.

It is a nialpdrome in base 14.

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, 4284 + ... + 4289.

It is an arithmetic number, because the mean of its divisors is an integer number (8574).

2²⁵⁷¹⁹ is an apocalyptic number.

25719 is a deficient number, since it is larger than the sum of its proper divisors (8577).

25719 is an equidigital number, since it uses as much as digits as its factorization.

25719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8576.

The product of its digits is 630, while the sum is 24.

The square root of 25719 is about 160.3714438421. The cubic root of 25719 is about 29.5178480522.

It can be divided in two parts, 257 and 19, that added together give a triangular number (276 = T₂₃).

The spelling of 25719 in words is "twenty-five thousand, seven hundred nineteen".