25396 has 12 divisors (see below), whose sum is σ = 50848. Its totient is φ = 10872.

The previous prime is 25391. The next prime is 25409. The reversal of 25396 is 69352.

25396 is an admirable number.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 25396.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25391) by changing a digit.

25396 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 426 + ... + 481.

2²⁵³⁹⁶ is an apocalyptic number.

It is an amenable number.

25396 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25424).

25396 is a wasteful number, since it uses less digits than its factorization.

25396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 916 counting only the distinct ones).

The product of its digits is 1620, while the sum is 25.

The square root of 25396 is about 159.3612248949. The cubic root of 25396 is about 29.3937574480.

Subtracting 25396 from its reverse (69352), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 25396 in words is "twenty-five thousand, three hundred ninety-six".