26065621 has 2 divisors, whose sum is σ = 26065622. Its totient is φ = 26065620.

The previous prime is 26065619. The next prime is 26065631. The reversal of 26065621 is 12656062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24147396 + 1918225 = 4914^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 26065621 - 2¹ = 26065619 is a prime.

Together with 26065619, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 26065621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26065631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13032810 + 13032811.

It is an arithmetic number, because the mean of its divisors is an integer number (13032811).

Almost surely, 2^26065621 is an apocalyptic number.

It is an amenable number.

26065621 is a deficient number, since it is larger than the sum of its proper divisors (1).

26065621 is an equidigital number, since it uses as much as digits as its factorization.

26065621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 26065621 is about 5105.4501270701. The cubic root of 26065621 is about 296.4986307306.

The spelling of 26065621 in words is "twenty-six million, sixty-five thousand, six hundred twenty-one".