25105439 has 2 divisors, whose sum is σ = 25105440. Its totient is φ = 25105438.

The previous prime is 25105433. The next prime is 25105463. The reversal of 25105439 is 93450152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25105439 - 2⁸ = 25105183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25105433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12552719 + 12552720.

It is an arithmetic number, because the mean of its divisors is an integer number (12552720).

Almost surely, 2^25105439 is an apocalyptic number.

25105439 is a deficient number, since it is larger than the sum of its proper divisors (1).

25105439 is an equidigital number, since it uses as much as digits as its factorization.

25105439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 25105439 is about 5010.5328059998. The cubic root of 25105439 is about 292.8122712702.

The spelling of 25105439 in words is "twenty-five million, one hundred five thousand, four hundred thirty-nine".