25000681 has 2 divisors, whose sum is σ = 25000682. Its totient is φ = 25000680.

The previous prime is 25000669. The next prime is 25000691. The reversal of 25000681 is 18600052.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13838400 + 11162281 = 3720^2 + 3341^2 .

It is a cyclic number.

It is not a de Polignac number, because 25000681 - 2⁵ = 25000649 is a prime.

It is a super-2 number, since 2×25000681² = 1250068100927522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25000621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12500340 + 12500341.

It is an arithmetic number, because the mean of its divisors is an integer number (12500341).

Almost surely, 2^25000681 is an apocalyptic number.

It is an amenable number.

25000681 is a deficient number, since it is larger than the sum of its proper divisors (1).

25000681 is an equidigital number, since it uses as much as digits as its factorization.

25000681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 25000681 is about 5000.0680995362. The cubic root of 25000681 is about 292.4044288053.

The spelling of 25000681 in words is "twenty-five million, six hundred eighty-one", and thus it is an aban number.