26242565 has 4 divisors (see below), whose sum is σ = 31491084. Its totient is φ = 20994048.

The previous prime is 26242561. The next prime is 26242597. The reversal of 26242565 is 56524262.

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 4879681 + 21362884 = 2209^2 + 4622^2 .

It is a cyclic number.

It is not a de Polignac number, because 26242565 - 2² = 26242561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26242561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2624252 + ... + 2624261.

It is an arithmetic number, because the mean of its divisors is an integer number (7872771).

Almost surely, 2^26242565 is an apocalyptic number.

It is an amenable number.

26242565 is a deficient number, since it is larger than the sum of its proper divisors (5248519).

26242565 is an equidigital number, since it uses as much as digits as its factorization.

26242565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248518.

The product of its digits is 28800, while the sum is 32.

The square root of 26242565 is about 5122.7497498902. The cubic root of 26242565 is about 297.1680359031.

The spelling of 26242565 in words is "twenty-six million, two hundred forty-two thousand, five hundred sixty-five".