26421559 has 2 divisors, whose sum is σ = 26421560. Its totient is φ = 26421558.

The previous prime is 26421529. The next prime is 26421583. The reversal of 26421559 is 95512462.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26421559 - 2¹¹ = 26419511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26421509) 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, 13210779 + 13210780.

It is an arithmetic number, because the mean of its divisors is an integer number (13210780).

Almost surely, 2^26421559 is an apocalyptic number.

26421559 is a deficient number, since it is larger than the sum of its proper divisors (1).

26421559 is an equidigital number, since it uses as much as digits as its factorization.

26421559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 26421559 is about 5140.1905606699. The cubic root of 26421559 is about 297.8421419689.

The spelling of 26421559 in words is "twenty-six million, four hundred twenty-one thousand, five hundred fifty-nine".