25800851 has 2 divisors, whose sum is σ = 25800852. Its totient is φ = 25800850.

The previous prime is 25800839. The next prime is 25800857. The reversal of 25800851 is 15800852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25800851 - 2¹⁸ = 25538707 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25800857) 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, 12900425 + 12900426.

It is an arithmetic number, because the mean of its divisors is an integer number (12900426).

Almost surely, 2^25800851 is an apocalyptic number.

25800851 is a deficient number, since it is larger than the sum of its proper divisors (1).

25800851 is an equidigital number, since it uses as much as digits as its factorization.

25800851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 25800851 is about 5079.4538092200. The cubic root of 25800851 is about 295.4912851741.

Subtracting from 25800851 its reverse (15800852), we obtain a palindrome (9999999).

The spelling of 25800851 in words is "twenty-five million, eight hundred thousand, eight hundred fifty-one".