25736281 has 2 divisors, whose sum is σ = 25736282. Its totient is φ = 25736280.

The previous prime is 25736273. The next prime is 25736297. The reversal of 25736281 is 18263752.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16736281 + 9000000 = 4091^2 + 3000^2 .

It is a cyclic number.

It is not a de Polignac number, because 25736281 - 2³ = 25736273 is a prime.

It is a super-2 number, since 2×25736281² = 1324712319421922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25736251) 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, 12868140 + 12868141.

It is an arithmetic number, because the mean of its divisors is an integer number (12868141).

Almost surely, 2^25736281 is an apocalyptic number.

It is an amenable number.

25736281 is a deficient number, since it is larger than the sum of its proper divisors (1).

25736281 is an equidigital number, since it uses as much as digits as its factorization.

25736281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 25736281 is about 5073.0938292131. The cubic root of 25736281 is about 295.2445774063.

The spelling of 25736281 in words is "twenty-five million, seven hundred thirty-six thousand, two hundred eighty-one".