25989321 has 8 divisors (see below), whose sum is σ = 36476320. Its totient is φ = 16414272.

The previous prime is 25989319. The next prime is 25989331. The reversal of 25989321 is 12398952.

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

It is not a de Polignac number, because 25989321 - 2¹ = 25989319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25989321.

It is not an unprimeable number, because it can be changed into a prime (25989331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227920 + ... + 228033.

It is an arithmetic number, because the mean of its divisors is an integer number (4559540).

Almost surely, 2^25989321 is an apocalyptic number.

It is an amenable number.

25989321 is a deficient number, since it is larger than the sum of its proper divisors (10486999).

25989321 is a wasteful number, since it uses less digits than its factorization.

25989321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455975.

The product of its digits is 38880, while the sum is 39.

The square root of 25989321 is about 5097.9722439417. The cubic root of 25989321 is about 296.2090416768.

The spelling of 25989321 in words is "twenty-five million, nine hundred eighty-nine thousand, three hundred twenty-one".