26125681 has 2 divisors, whose sum is σ = 26125682. Its totient is φ = 26125680.

The previous prime is 26125679. The next prime is 26125691. The reversal of 26125681 is 18652162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17715681 + 8410000 = 4209^2 + 2900^2 .

It is a cyclic number.

It is not a de Polignac number, because 26125681 - 2¹ = 26125679 is a prime.

It is a super-2 number, since 2×26125681² = 1365102415427522, which contains 22 as substring.

Together with 26125679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26125601) 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, 13062840 + 13062841.

It is an arithmetic number, because the mean of its divisors is an integer number (13062841).

Almost surely, 2^26125681 is an apocalyptic number.

It is an amenable number.

26125681 is a deficient number, since it is larger than the sum of its proper divisors (1).

26125681 is an equidigital number, since it uses as much as digits as its factorization.

26125681 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 26125681 is about 5111.3286922287. The cubic root of 26125681 is about 296.7261852276.

The spelling of 26125681 in words is "twenty-six million, one hundred twenty-five thousand, six hundred eighty-one".