25872439 has 4 divisors (see below), whose sum is σ = 25886656. Its totient is φ = 25858224.

The previous prime is 25872409. The next prime is 25872443. The reversal of 25872439 is 93427852.

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 25872439 - 2⁷ = 25872311 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 (25872409) 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, 3894 + ... + 8179.

It is an arithmetic number, because the mean of its divisors is an integer number (6471664).

Almost surely, 2^25872439 is an apocalyptic number.

25872439 is a deficient number, since it is larger than the sum of its proper divisors (14217).

25872439 is a wasteful number, since it uses less digits than its factorization.

25872439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14216.

The product of its digits is 120960, while the sum is 40.

The square root of 25872439 is about 5086.4957485483. The cubic root of 25872439 is about 295.7643264997.

The spelling of 25872439 in words is "twenty-five million, eight hundred seventy-two thousand, four hundred thirty-nine".