25829 has 4 divisors (see below), whose sum is σ = 26976. Its totient is φ = 24684.

The previous prime is 25819. The next prime is 25841. The reversal of 25829 is 92852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 25798 and 25807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25819) 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, 539 + ... + 584.

It is an arithmetic number, because the mean of its divisors is an integer number (6744).

2²⁵⁸²⁹ is an apocalyptic number.

It is an amenable number.

25829 is a deficient number, since it is larger than the sum of its proper divisors (1147).

25829 is a wasteful number, since it uses less digits than its factorization.

25829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146.

The product of its digits is 1440, while the sum is 26.

The square root of 25829 is about 160.7140317458. The cubic root of 25829 is about 29.5598707485.

Subtracting from 25829 its product of digits (1440), we obtain a cube (24389 = 29³).

The spelling of 25829 in words is "twenty-five thousand, eight hundred twenty-nine".