25838539 has 4 divisors (see below), whose sum is σ = 25856280. Its totient is φ = 25820800.

The previous prime is 25838513. The next prime is 25838551. The reversal of 25838539 is 93583852.

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 25838539 - 2⁹ = 25838027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25838495 and 25838504.

It is not an unprimeable number, because it can be changed into a prime (25838509) 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, 6469 + ... + 9670.

It is an arithmetic number, because the mean of its divisors is an integer number (6464070).

Almost surely, 2^25838539 is an apocalyptic number.

25838539 is a deficient number, since it is larger than the sum of its proper divisors (17741).

25838539 is a wasteful number, since it uses less digits than its factorization.

25838539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17740.

The product of its digits is 259200, while the sum is 43.

The square root of 25838539 is about 5083.1623031337. The cubic root of 25838539 is about 295.6350925431.

The spelling of 25838539 in words is "twenty-five million, eight hundred thirty-eight thousand, five hundred thirty-nine".