25388681 has 2 divisors, whose sum is σ = 25388682. Its totient is φ = 25388680.

The previous prime is 25388663. The next prime is 25388707. The reversal of 25388681 is 18688352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18318400 + 7070281 = 4280^2 + 2659^2 .

It is a cyclic number.

It is not a de Polignac number, because 25388681 - 2¹⁰ = 25387657 is a prime.

It is a super-2 number, since 2×25388681² = 1289170245839522, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (25388611) 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, 12694340 + 12694341.

It is an arithmetic number, because the mean of its divisors is an integer number (12694341).

Almost surely, 2^25388681 is an apocalyptic number.

It is an amenable number.

25388681 is a deficient number, since it is larger than the sum of its proper divisors (1).

25388681 is an equidigital number, since it uses as much as digits as its factorization.

25388681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 41.

The square root of 25388681 is about 5038.7181901750. The cubic root of 25388681 is about 293.9093346543.

The spelling of 25388681 in words is "twenty-five million, three hundred eighty-eight thousand, six hundred eighty-one".