41721409 has 2 divisors, whose sum is σ = 41721410. Its totient is φ = 41721408.

The previous prime is 41721403. The next prime is 41721431. The reversal of 41721409 is 90412714.

41721409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39250225 + 2471184 = 6265^2 + 1572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41721409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (41721403) 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, 20860704 + 20860705.

It is an arithmetic number, because the mean of its divisors is an integer number (20860705).

Almost surely, 2^41721409 is an apocalyptic number.

It is an amenable number.

41721409 is a deficient number, since it is larger than the sum of its proper divisors (1).

41721409 is an equidigital number, since it uses as much as digits as its factorization.

41721409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 41721409 is about 6459.2111747488. The cubic root of 41721409 is about 346.8323955898.

The spelling of 41721409 in words is "forty-one million, seven hundred twenty-one thousand, four hundred nine".