26159621 has 2 divisors, whose sum is σ = 26159622. Its totient is φ = 26159620.

The previous prime is 26159611. The next prime is 26159633. The reversal of 26159621 is 12695162.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26061025 + 98596 = 5105^2 + 314^2 .

It is a cyclic number.

It is not a de Polignac number, because 26159621 - 2⁶ = 26159557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26159611) 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 as a sum of consecutive naturals, namely, 13079810 + 13079811.

It is an arithmetic number, because the mean of its divisors is an integer number (13079811).

Almost surely, 2^26159621 is an apocalyptic number.

It is an amenable number.

26159621 is a deficient number, since it is larger than the sum of its proper divisors (1).

26159621 is an equidigital number, since it uses as much as digits as its factorization.

26159621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 26159621 is about 5114.6476907017. The cubic root of 26159621 is about 296.8546224388.

The spelling of 26159621 in words is "twenty-six million, one hundred fifty-nine thousand, six hundred twenty-one".