26256217 has 4 divisors (see below), whose sum is σ = 28275940. Its totient is φ = 24236496.

The previous prime is 26256149. The next prime is 26256229. The reversal of 26256217 is 71265262.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3779136 + 22477081 = 1944^2 + 4741^2 .

It is a cyclic number.

It is not a de Polignac number, because 26256217 - 2¹¹ = 26254169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26256017) 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 in 3 ways as a sum of consecutive naturals, for example, 1009842 + ... + 1009867.

It is an arithmetic number, because the mean of its divisors is an integer number (7068985).

Almost surely, 2^26256217 is an apocalyptic number.

It is an amenable number.

26256217 is a deficient number, since it is larger than the sum of its proper divisors (2019723).

26256217 is a wasteful number, since it uses less digits than its factorization.

26256217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019722.

The product of its digits is 10080, while the sum is 31.

The square root of 26256217 is about 5124.0820641360. The cubic root of 26256217 is about 297.2195582387.

The spelling of 26256217 in words is "twenty-six million, two hundred fifty-six thousand, two hundred seventeen".