25990321 has 8 divisors (see below), whose sum is σ = 29735424. Its totient is φ = 22253280.

The previous prime is 25990319. The next prime is 25990337. The reversal of 25990321 is 12309952.

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

It is not a de Polignac number, because 25990321 - 2¹ = 25990319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25990421) 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 7 ways as a sum of consecutive naturals, for example, 8736 + ... + 11326.

It is an arithmetic number, because the mean of its divisors is an integer number (3716928).

Almost surely, 2^25990321 is an apocalyptic number.

It is an amenable number.

25990321 is a deficient number, since it is larger than the sum of its proper divisors (3745103).

25990321 is a wasteful number, since it uses less digits than its factorization.

25990321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 25990321 is about 5098.0703212098. The cubic root of 25990321 is about 296.2128407403.

The spelling of 25990321 in words is "twenty-five million, nine hundred ninety thousand, three hundred twenty-one".