25985321 has 4 divisors (see below), whose sum is σ = 25995732. Its totient is φ = 25974912.

The previous prime is 25985263. The next prime is 25985339. The reversal of 25985321 is 12358952.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 13104400 + 12880921 = 3620^2 + 3589^2 .

It is a cyclic number.

It is not a de Polignac number, because 25985321 - 2⁶ = 25985257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25985341) 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, 1025 + ... + 7281.

It is an arithmetic number, because the mean of its divisors is an integer number (6498933).

Almost surely, 2^25985321 is an apocalyptic number.

It is an amenable number.

25985321 is a deficient number, since it is larger than the sum of its proper divisors (10411).

25985321 is an equidigital number, since it uses as much as digits as its factorization.

25985321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10410.

The product of its digits is 21600, while the sum is 35.

The square root of 25985321 is about 5097.5799159994. The cubic root of 25985321 is about 296.1938444482.

The spelling of 25985321 in words is "twenty-five million, nine hundred eighty-five thousand, three hundred twenty-one".