26255209 has 2 divisors, whose sum is σ = 26255210. Its totient is φ = 26255208.

The previous prime is 26255197. The next prime is 26255249. The reversal of 26255209 is 90255262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17682025 + 8573184 = 4205^2 + 2928^2 .

It is a cyclic number.

It is not a de Polignac number, because 26255209 - 2¹³ = 26247017 is a prime.

It is not a weakly prime, because it can be changed into another prime (26255249) 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, 13127604 + 13127605.

It is an arithmetic number, because the mean of its divisors is an integer number (13127605).

Almost surely, 2^26255209 is an apocalyptic number.

It is an amenable number.

26255209 is a deficient number, since it is larger than the sum of its proper divisors (1).

26255209 is an equidigital number, since it uses as much as digits as its factorization.

26255209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 26255209 is about 5123.9837041115. The cubic root of 26255209 is about 297.2157546805.

The spelling of 26255209 in words is "twenty-six million, two hundred fifty-five thousand, two hundred nine".