25989361 has 4 divisors (see below), whose sum is σ = 26032372. Its totient is φ = 25946352.

The previous prime is 25989349. The next prime is 25989391. The reversal of 25989361 is 16398952.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5377761 + 20611600 = 2319^2 + 4540^2 .

It is a cyclic number.

It is not a de Polignac number, because 25989361 - 2⁹ = 25988849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25989331) 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 3 ways as a sum of consecutive naturals, for example, 20586 + ... + 21811.

It is an arithmetic number, because the mean of its divisors is an integer number (6508093).

Almost surely, 2^25989361 is an apocalyptic number.

It is an amenable number.

25989361 is a deficient number, since it is larger than the sum of its proper divisors (43011).

25989361 is an equidigital number, since it uses as much as digits as its factorization.

25989361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43010.

The product of its digits is 116640, while the sum is 43.

The square root of 25989361 is about 5097.9761670687. The cubic root of 25989361 is about 296.2091936412.

The spelling of 25989361 in words is "twenty-five million, nine hundred eighty-nine thousand, three hundred sixty-one".