25786081 has 2 divisors, whose sum is σ = 25786082. Its totient is φ = 25786080.

The previous prime is 25786073. The next prime is 25786091. The reversal of 25786081 is 18068752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15673681 + 10112400 = 3959^2 + 3180^2 .

It is a cyclic number.

It is not a de Polignac number, because 25786081 - 2³ = 25786073 is a prime.

It is a super-2 number, since 2×25786081² = 1329843946677122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25786081.

It is not a weakly prime, because it can be changed into another prime (25786001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12893040 + 12893041.

It is an arithmetic number, because the mean of its divisors is an integer number (12893041).

Almost surely, 2^25786081 is an apocalyptic number.

It is an amenable number.

25786081 is a deficient number, since it is larger than the sum of its proper divisors (1).

25786081 is an equidigital number, since it uses as much as digits as its factorization.

25786081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 25786081 is about 5077.9997046081. Note that the first 3 decimals coincide. The cubic root of 25786081 is about 295.4348885929.

The spelling of 25786081 in words is "twenty-five million, seven hundred eighty-six thousand, eighty-one".