26260021 has 2 divisors, whose sum is σ = 26260022. Its totient is φ = 26260020.

The previous prime is 26259991. The next prime is 26260027. The reversal of 26260021 is 12006262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23872996 + 2387025 = 4886^2 + 1545^2 .

It is a cyclic number.

It is not a de Polignac number, because 26260021 - 2¹⁹ = 25735733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26260027) 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, 13130010 + 13130011.

It is an arithmetic number, because the mean of its divisors is an integer number (13130011).

Almost surely, 2^26260021 is an apocalyptic number.

It is an amenable number.

26260021 is a deficient number, since it is larger than the sum of its proper divisors (1).

26260021 is an equidigital number, since it uses as much as digits as its factorization.

26260021 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 19.

The square root of 26260021 is about 5124.4532391271. The cubic root of 26260021 is about 297.2339112660.

Adding to 26260021 its reverse (12006262), we get a palindrome (38266283).

The spelling of 26260021 in words is "twenty-six million, two hundred sixty thousand, twenty-one".