26105881 has 2 divisors, whose sum is σ = 26105882. Its totient is φ = 26105880.

The previous prime is 26105879. The next prime is 26105903. The reversal of 26105881 is 18850162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24840256 + 1265625 = 4984^2 + 1125^2 .

It is a cyclic number.

It is not a de Polignac number, because 26105881 - 2¹ = 26105879 is a prime.

It is a super-2 number, since 2×26105881² = 1363034045572322, which contains 22 as substring.

Together with 26105879, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26105801) 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, 13052940 + 13052941.

It is an arithmetic number, because the mean of its divisors is an integer number (13052941).

Almost surely, 2^26105881 is an apocalyptic number.

It is an amenable number.

26105881 is a deficient number, since it is larger than the sum of its proper divisors (1).

26105881 is an equidigital number, since it uses as much as digits as its factorization.

26105881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 26105881 is about 5109.3914510439. The cubic root of 26105881 is about 296.6512058320.

The spelling of 26105881 in words is "twenty-six million, one hundred five thousand, eight hundred eighty-one".