26320621 has 2 divisors, whose sum is σ = 26320622. Its totient is φ = 26320620.

The previous prime is 26320589. The next prime is 26320627. The reversal of 26320621 is 12602362.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26316900 + 3721 = 5130^2 + 61^2 .

It is a cyclic number.

It is not a de Polignac number, because 26320621 - 2⁵ = 26320589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26320592 and 26320601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26320627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13160310 + 13160311.

It is an arithmetic number, because the mean of its divisors is an integer number (13160311).

Almost surely, 2^26320621 is an apocalyptic number.

It is an amenable number.

26320621 is a deficient number, since it is larger than the sum of its proper divisors (1).

26320621 is an equidigital number, since it uses as much as digits as its factorization.

26320621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 26320621 is about 5130.3626577465. The cubic root of 26320621 is about 297.4623769008.

Adding to 26320621 its reverse (12602362), we get a palindrome (38922983).

The spelling of 26320621 in words is "twenty-six million, three hundred twenty thousand, six hundred twenty-one".