26340505 has 4 divisors (see below), whose sum is σ = 31608612. Its totient is φ = 21072400.

The previous prime is 26340473. The next prime is 26340521. The reversal of 26340505 is 50504362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50504362 = 2 ⋅25252181.

It can be written as a sum of positive squares in 2 ways, for example, as 11471769 + 14868736 = 3387^2 + 3856^2 .

It is not a de Polignac number, because 26340505 - 2⁵ = 26340473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26340505.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 2634046 + ... + 2634055.

It is an arithmetic number, because the mean of its divisors is an integer number (7902153).

Almost surely, 2^26340505 is an apocalyptic number.

It is an amenable number.

26340505 is a deficient number, since it is larger than the sum of its proper divisors (5268107).

26340505 is an equidigital number, since it uses as much as digits as its factorization.

26340505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5268106.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 26340505 is about 5132.3001665920. The cubic root of 26340505 is about 297.5372643574.

Adding to 26340505 its reverse (50504362), we get a palindrome (76844867).

The spelling of 26340505 in words is "twenty-six million, three hundred forty thousand, five hundred five".