25535 has 4 divisors (see below), whose sum is σ = 30648. Its totient is φ = 20424.

The previous prime is 25523. The next prime is 25537. The reversal of 25535 is 53552.

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

It is a cyclic number.

It is not a de Polignac number, because 25535 - 2⁶ = 25471 is a prime.

It is a Duffinian number.

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 25535.

It is not an unprimeable number, because it can be changed into a prime (25537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2549 + ... + 2558.

It is an arithmetic number, because the mean of its divisors is an integer number (7662).

2²⁵⁵³⁵ is an apocalyptic number.

25535 is a deficient number, since it is larger than the sum of its proper divisors (5113).

25535 is an equidigital number, since it uses as much as digits as its factorization.

25535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112.

The product of its digits is 750, while the sum is 20.

The square root of 25535 is about 159.7967458993. The cubic root of 25535 is about 29.4472868846.

The spelling of 25535 in words is "twenty-five thousand, five hundred thirty-five".