25965439 has 2 divisors, whose sum is σ = 25965440. Its totient is φ = 25965438.

The previous prime is 25965437. The next prime is 25965497. The reversal of 25965439 is 93456952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25965439 - 2¹ = 25965437 is a prime.

Together with 25965437, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 25965395 and 25965404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25965431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12982719 + 12982720.

It is an arithmetic number, because the mean of its divisors is an integer number (12982720).

Almost surely, 2^25965439 is an apocalyptic number.

25965439 is a deficient number, since it is larger than the sum of its proper divisors (1).

25965439 is an equidigital number, since it uses as much as digits as its factorization.

25965439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 43.

The square root of 25965439 is about 5095.6294017521. The cubic root of 25965439 is about 296.1182834732.

The spelling of 25965439 in words is "twenty-five million, nine hundred sixty-five thousand, four hundred thirty-nine".