25435 has 4 divisors (see below), whose sum is σ = 30528. Its totient is φ = 20344.

The previous prime is 25423. The next prime is 25439. The reversal of 25435 is 53452.

It is a happy number.

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 25435 - 2⁷ = 25307 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 5 + 4⁷ + 3⁶ + 5³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25439) 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, 2539 + ... + 2548.

It is an arithmetic number, because the mean of its divisors is an integer number (7632).

2²⁵⁴³⁵ is an apocalyptic number.

25435 is a deficient number, since it is larger than the sum of its proper divisors (5093).

25435 is an equidigital number, since it uses as much as digits as its factorization.

25435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5092.

The product of its digits is 600, while the sum is 19.

The square root of 25435 is about 159.4835414706. The cubic root of 25435 is about 29.4087961710.

Adding to 25435 its reverse (53452), we get a palindrome (78887).

It can be divided in two parts, 254 and 35, that added together give a square (289 = 17²).

The spelling of 25435 in words is "twenty-five thousand, four hundred thirty-five".