25225439 has 4 divisors (see below), whose sum is σ = 25352400. Its totient is φ = 25098480.

The previous prime is 25225397. The next prime is 25225441. The reversal of 25225439 is 93452252.

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 25225439 - 2¹⁶ = 25159903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25225469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63182 + ... + 63579.

It is an arithmetic number, because the mean of its divisors is an integer number (6338100).

Almost surely, 2^25225439 is an apocalyptic number.

25225439 is a deficient number, since it is larger than the sum of its proper divisors (126961).

25225439 is a wasteful number, since it uses less digits than its factorization.

25225439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126960.

The product of its digits is 21600, while the sum is 32.

The square root of 25225439 is about 5022.4933051225. The cubic root of 25225439 is about 293.2780619289.

The spelling of 25225439 in words is "twenty-five million, two hundred twenty-five thousand, four hundred thirty-nine".