26128481 has 2 divisors, whose sum is σ = 26128482. Its totient is φ = 26128480.

The previous prime is 26128471. The next prime is 26128511. The reversal of 26128481 is 18482162.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24840256 + 1288225 = 4984^2 + 1135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26128481 is a prime.

It is a super-2 number, since 2×26128481² = 1365395038734722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26128471) 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, 13064240 + 13064241.

It is an arithmetic number, because the mean of its divisors is an integer number (13064241).

Almost surely, 2^26128481 is an apocalyptic number.

It is an amenable number.

26128481 is a deficient number, since it is larger than the sum of its proper divisors (1).

26128481 is an equidigital number, since it uses as much as digits as its factorization.

26128481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 32.

The square root of 26128481 is about 5111.6025862737. The cubic root of 26128481 is about 296.7367853167.

The spelling of 26128481 in words is "twenty-six million, one hundred twenty-eight thousand, four hundred eighty-one".