26120621 has 2 divisors, whose sum is σ = 26120622. Its totient is φ = 26120620.

The previous prime is 26120603. The next prime is 26120669. The reversal of 26120621 is 12602162.

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., 25908100 + 212521 = 5090^2 + 461^2 .

It is a cyclic number.

It is not a de Polignac number, because 26120621 - 2¹⁴ = 26104237 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 26120593 and 26120602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26120671) 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, 13060310 + 13060311.

It is an arithmetic number, because the mean of its divisors is an integer number (13060311).

Almost surely, 2^26120621 is an apocalyptic number.

It is an amenable number.

26120621 is a deficient number, since it is larger than the sum of its proper divisors (1).

26120621 is an equidigital number, since it uses as much as digits as its factorization.

26120621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 26120621 is about 5110.8336893309. The cubic root of 26120621 is about 296.7070274311.

Adding to 26120621 its reverse (12602162), we get a palindrome (38722783).

The spelling of 26120621 in words is "twenty-six million, one hundred twenty thousand, six hundred twenty-one".