26043221 has 2 divisors, whose sum is σ = 26043222. Its totient is φ = 26043220.

The previous prime is 26043209. The next prime is 26043229. The reversal of 26043221 is 12234062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20702500 + 5340721 = 4550^2 + 2311^2 .

It is a cyclic number.

It is not a de Polignac number, because 26043221 - 2¹⁰ = 26042197 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 26043193 and 26043202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26043229) 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 as a sum of consecutive naturals, namely, 13021610 + 13021611.

It is an arithmetic number, because the mean of its divisors is an integer number (13021611).

Almost surely, 2^26043221 is an apocalyptic number.

It is an amenable number.

26043221 is a deficient number, since it is larger than the sum of its proper divisors (1).

26043221 is an equidigital number, since it uses as much as digits as its factorization.

26043221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 26043221 is about 5103.2559214682. The cubic root of 26043221 is about 296.4136724279.

Adding to 26043221 its reverse (12234062), we get a palindrome (38277283).

The spelling of 26043221 in words is "twenty-six million, forty-three thousand, two hundred twenty-one".