25917 has 8 divisors (see below), whose sum is σ = 35424. Its totient is φ = 16848.

The previous prime is 25913. The next prime is 25919. The reversal of 25917 is 71952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25917 - 2² = 25913 is a prime.

25917 is a lucky number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25917.

It is not an unprimeable number, because it can be changed into a prime (25913) 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, 78 + ... + 240.

It is an arithmetic number, because the mean of its divisors is an integer number (4428).

2²⁵⁹¹⁷ is an apocalyptic number.

It is an amenable number.

25917 is a deficient number, since it is larger than the sum of its proper divisors (9507).

25917 is a wasteful number, since it uses less digits than its factorization.

25917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219.

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

The square root of 25917 is about 160.9875771605. The cubic root of 25917 is about 29.5934030831.

It can be divided in two parts, 259 and 17, that added together give a triangular number (276 = T₂₃).

The spelling of 25917 in words is "twenty-five thousand, nine hundred seventeen".