26305243 has 4 divisors (see below), whose sum is σ = 26360640. Its totient is φ = 26249848.

The previous prime is 26305219. The next prime is 26305259. The reversal of 26305243 is 34250362.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 26305243 - 2⁵ = 26305211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26305283) 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 in 3 ways as a sum of consecutive naturals, for example, 26980 + ... + 27937.

It is an arithmetic number, because the mean of its divisors is an integer number (6590160).

Almost surely, 2^26305243 is an apocalyptic number.

26305243 is a deficient number, since it is larger than the sum of its proper divisors (55397).

26305243 is an equidigital number, since it uses as much as digits as its factorization.

26305243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55396.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 26305243 is about 5128.8637143133. The cubic root of 26305243 is about 297.4044341495.

The spelling of 26305243 in words is "twenty-six million, three hundred five thousand, two hundred forty-three".