25612681 has 2 divisors, whose sum is σ = 25612682. Its totient is φ = 25612680.

The previous prime is 25612673. The next prime is 25612709. The reversal of 25612681 is 18621652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23814400 + 1798281 = 4880^2 + 1341^2 .

It is a cyclic number.

It is not a de Polignac number, because 25612681 - 2³ = 25612673 is a prime.

It is a super-2 number, since 2×25612681² = 1312018856015522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25612651) 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, 12806340 + 12806341.

It is an arithmetic number, because the mean of its divisors is an integer number (12806341).

Almost surely, 2^25612681 is an apocalyptic number.

It is an amenable number.

25612681 is a deficient number, since it is larger than the sum of its proper divisors (1).

25612681 is an equidigital number, since it uses as much as digits as its factorization.

25612681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 31.

The square root of 25612681 is about 5060.8972524642. The cubic root of 25612681 is about 294.7711756118.

The spelling of 25612681 in words is "twenty-five million, six hundred twelve thousand, six hundred eighty-one".