25385 has 4 divisors (see below), whose sum is σ = 30468. Its totient is φ = 20304.

The previous prime is 25373. The next prime is 25391. The reversal of 25385 is 58352.

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 18496 + 6889 = 136^2 + 83^2 .

It is a cyclic number.

It is not a de Polignac number, because 25385 - 2⁶ = 25321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25385.

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 25385.

It is an unprimeable 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, 2534 + ... + 2543.

It is an arithmetic number, because the mean of its divisors is an integer number (7617).

2²⁵³⁸⁵ is an apocalyptic number.

It is an amenable number.

25385 is a deficient number, since it is larger than the sum of its proper divisors (5083).

25385 is an equidigital number, since it uses as much as digits as its factorization.

25385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5082.

The product of its digits is 1200, while the sum is 23.

The square root of 25385 is about 159.3267083699. The cubic root of 25385 is about 29.3895129734.

The spelling of 25385 in words is "twenty-five thousand, three hundred eighty-five".