25888861 has 2 divisors, whose sum is σ = 25888862. Its totient is φ = 25888860.

The previous prime is 25888859. The next prime is 25888871. The reversal of 25888861 is 16888852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15163236 + 10725625 = 3894^2 + 3275^2 .

It is a cyclic number.

It is not a de Polignac number, because 25888861 - 2¹ = 25888859 is a prime.

Together with 25888859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25888831) 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, 12944430 + 12944431.

It is an arithmetic number, because the mean of its divisors is an integer number (12944431).

Almost surely, 2^25888861 is an apocalyptic number.

It is an amenable number.

25888861 is a deficient number, since it is larger than the sum of its proper divisors (1).

25888861 is an equidigital number, since it uses as much as digits as its factorization.

25888861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 245760, while the sum is 46.

The square root of 25888861 is about 5088.1097668977. The cubic root of 25888861 is about 295.8268900446.

Subtracting from 25888861 its reverse (16888852), we obtain a palindrome (9000009).

It can be divided in two parts, 2588 and 8861, that added together give a square (11449 = 107²).

The spelling of 25888861 in words is "twenty-five million, eight hundred eighty-eight thousand, eight hundred sixty-one".