25825391 has 2 divisors, whose sum is σ = 25825392. Its totient is φ = 25825390.

The previous prime is 25825369. The next prime is 25825409. The reversal of 25825391 is 19352852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25825391 - 2¹⁰ = 25824367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25825361) 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 as a sum of consecutive naturals, namely, 12912695 + 12912696.

It is an arithmetic number, because the mean of its divisors is an integer number (12912696).

Almost surely, 2^25825391 is an apocalyptic number.

25825391 is a deficient number, since it is larger than the sum of its proper divisors (1).

25825391 is an equidigital number, since it uses as much as digits as its factorization.

25825391 is an odious number, because the sum of its binary digits is odd.

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

The square root of 25825391 is about 5081.8688491538. The cubic root of 25825391 is about 295.5849391697.

The spelling of 25825391 in words is "twenty-five million, eight hundred twenty-five thousand, three hundred ninety-one".