25705 has 8 divisors (see below), whose sum is σ = 31752. Its totient is φ = 19968.

The previous prime is 25703. The next prime is 25717. The reversal of 25705 is 50752.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4096 + 21609 = 64^2 + 147^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25705 - 2¹ = 25703 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (25703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217 + ... + 313.

It is an arithmetic number, because the mean of its divisors is an integer number (3969).

2²⁵⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

25705 is a deficient number, since it is larger than the sum of its proper divisors (6047).

25705 is an equidigital number, since it uses as much as digits as its factorization.

25705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155.

The product of its (nonzero) digits is 350, while the sum is 19.

The square root of 25705 is about 160.3277892319. The cubic root of 25705 is about 29.5124911192.

The spelling of 25705 in words is "twenty-five thousand, seven hundred five".