26128559 has 2 divisors, whose sum is σ = 26128560. Its totient is φ = 26128558.

The previous prime is 26128547. The next prime is 26128561. The reversal of 26128559 is 95582162.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26128559 is a prime.

Together with 26128561, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26128259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13064279 + 13064280.

It is an arithmetic number, because the mean of its divisors is an integer number (13064280).

Almost surely, 2^26128559 is an apocalyptic number.

26128559 is a deficient number, since it is larger than the sum of its proper divisors (1).

26128559 is an equidigital number, since it uses as much as digits as its factorization.

26128559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 38.

The square root of 26128559 is about 5111.6102159691. The cubic root of 26128559 is about 296.7370805940.

The spelling of 26128559 in words is "twenty-six million, one hundred twenty-eight thousand, five hundred fifty-nine".