25144239 has 8 divisors (see below), whose sum is σ = 35290240. Its totient is φ = 15880536.

The previous prime is 25144219. The next prime is 25144279. The reversal of 25144239 is 93244152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-25144239 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 (25144219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220507 + ... + 220620.

It is an arithmetic number, because the mean of its divisors is an integer number (4411280).

Almost surely, 2^25144239 is an apocalyptic number.

25144239 is a deficient number, since it is larger than the sum of its proper divisors (10146001).

25144239 is a wasteful number, since it uses less digits than its factorization.

25144239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441149.

The product of its digits is 8640, while the sum is 30.

The square root of 25144239 is about 5014.4031549129. The cubic root of 25144239 is about 292.9630389763.

The spelling of 25144239 in words is "twenty-five million, one hundred forty-four thousand, two hundred thirty-nine".