26053721 has 4 divisors (see below), whose sum is σ = 26066100. Its totient is φ = 26041344.

The previous prime is 26053681. The next prime is 26053723. The reversal of 26053721 is 12735062.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12735062 = 2 ⋅6367531.

It can be written as a sum of positive squares in 2 ways, for example, as 6375625 + 19678096 = 2525^2 + 4436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26053721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26053723) 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, 2156 + ... + 7533.

It is an arithmetic number, because the mean of its divisors is an integer number (6516525).

Almost surely, 2^26053721 is an apocalyptic number.

It is an amenable number.

26053721 is a deficient number, since it is larger than the sum of its proper divisors (12379).

26053721 is an equidigital number, since it uses as much as digits as its factorization.

26053721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12378.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 26053721 is about 5104.2845727878. The cubic root of 26053721 is about 296.4535026954.

Adding to 26053721 its reverse (12735062), we get a palindrome (38788783).

The spelling of 26053721 in words is "twenty-six million, fifty-three thousand, seven hundred twenty-one".