26748721 has 4 divisors (see below), whose sum is σ = 26791744. Its totient is φ = 26705700.

The previous prime is 26748703. The next prime is 26748727. The reversal of 26748721 is 12784762.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26748721 - 2¹¹ = 26746673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26748727) 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, 20565 + ... + 21826.

It is an arithmetic number, because the mean of its divisors is an integer number (6697936).

Almost surely, 2^26748721 is an apocalyptic number.

It is an amenable number.

26748721 is a deficient number, since it is larger than the sum of its proper divisors (43023).

26748721 is an equidigital number, since it uses as much as digits as its factorization.

26748721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43022.

The product of its digits is 37632, while the sum is 37.

The square root of 26748721 is about 5171.9165693193. The cubic root of 26748721 is about 299.0664349046.

The spelling of 26748721 in words is "twenty-six million, seven hundred forty-eight thousand, seven hundred twenty-one".