26025509 has 2 divisors, whose sum is σ = 26025510. Its totient is φ = 26025508.

The previous prime is 26025463. The next prime is 26025511. The reversal of 26025509 is 90552062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23980609 + 2044900 = 4897^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 26025509 - 2⁸ = 26025253 is a prime.

Together with 26025511, 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 (26025539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13012754 + 13012755.

It is an arithmetic number, because the mean of its divisors is an integer number (13012755).

Almost surely, 2^26025509 is an apocalyptic number.

It is an amenable number.

26025509 is a deficient number, since it is larger than the sum of its proper divisors (1).

26025509 is an equidigital number, since it uses as much as digits as its factorization.

26025509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 26025509 is about 5101.5202636077. The cubic root of 26025509 is about 296.3464601885.

The spelling of 26025509 in words is "twenty-six million, twenty-five thousand, five hundred nine".