25998443 has 4 divisors (see below), whose sum is σ = 26020080. Its totient is φ = 25976808.

The previous prime is 25998437. The next prime is 25998449. The reversal of 25998443 is 34489952.

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

It is an interprime number because it is at equal distance from previous prime (25998437) and next prime (25998449).

It is a cyclic number.

It is not a de Polignac number, because 25998443 - 2²⁴ = 9221227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25998394 and 25998403.

It is not an unprimeable number, because it can be changed into a prime (25998449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8903 + ... + 11456.

It is an arithmetic number, because the mean of its divisors is an integer number (6505020).

Almost surely, 2^25998443 is an apocalyptic number.

25998443 is a deficient number, since it is larger than the sum of its proper divisors (21637).

25998443 is a wasteful number, since it uses less digits than its factorization.

25998443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21636.

The product of its digits is 311040, while the sum is 44.

The square root of 25998443 is about 5098.8668348958. The cubic root of 25998443 is about 296.2436931248.

The spelling of 25998443 in words is "twenty-five million, nine hundred ninety-eight thousand, four hundred forty-three".