26921249 has 2 divisors, whose sum is σ = 26921250. Its totient is φ = 26921248.

The previous prime is 26921239. The next prime is 26921263. The reversal of 26921249 is 94212962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25321024 + 1600225 = 5032^2 + 1265^2 .

It is a cyclic number.

It is not a de Polignac number, because 26921249 - 2²⁴ = 10144033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (26921239) 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, 13460624 + 13460625.

It is an arithmetic number, because the mean of its divisors is an integer number (13460625).

Almost surely, 2^26921249 is an apocalyptic number.

It is an amenable number.

26921249 is a deficient number, since it is larger than the sum of its proper divisors (1).

26921249 is an equidigital number, since it uses as much as digits as its factorization.

26921249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 26921249 is about 5188.5690705627. The cubic root of 26921249 is about 299.7080455972.

The spelling of 26921249 in words is "twenty-six million, nine hundred twenty-one thousand, two hundred forty-nine".