25769 has 4 divisors (see below), whose sum is σ = 26196. Its totient is φ = 25344.

The previous prime is 25763. The next prime is 25771. The reversal of 25769 is 96752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12544 + 13225 = 112^2 + 115^2 .

It is a cyclic number.

It is not a de Polignac number, because 25769 - 2¹² = 21673 is a prime.

It is a super-2 number, since 2×25769² = 1328082722, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹³ + 5 + 7⁵ + 6² + 9³ .

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (25763) 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 3 ways as a sum of consecutive naturals, for example, 104 + ... + 249.

It is an arithmetic number, because the mean of its divisors is an integer number (6549).

2²⁵⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

25769 is a deficient number, since it is larger than the sum of its proper divisors (427).

25769 is an equidigital number, since it uses as much as digits as its factorization.

25769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426.

The product of its digits is 3780, while the sum is 29.

The square root of 25769 is about 160.5272562526. The cubic root of 25769 is about 29.5369641015.

The spelling of 25769 in words is "twenty-five thousand, seven hundred sixty-nine".