25439129 has 4 divisors (see below), whose sum is σ = 25458384. Its totient is φ = 25419876.

The previous prime is 25439111. The next prime is 25439149. The reversal of 25439129 is 92193452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25439129 - 2⁸ = 25438873 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (25439149) 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, 7487 + ... + 10340.

It is an arithmetic number, because the mean of its divisors is an integer number (6364596).

Almost surely, 2^25439129 is an apocalyptic number.

It is an amenable number.

25439129 is a deficient number, since it is larger than the sum of its proper divisors (19255).

25439129 is a wasteful number, since it uses less digits than its factorization.

25439129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19254.

The product of its digits is 19440, while the sum is 35.

The square root of 25439129 is about 5043.7217409369. The cubic root of 25439129 is about 294.1038744743.

The spelling of 25439129 in words is "twenty-five million, four hundred thirty-nine thousand, one hundred twenty-nine".