4065409 has 2 divisors, whose sum is σ = 4065410. Its totient is φ = 4065408.

The previous prime is 4065403. The next prime is 4065427. The reversal of 4065409 is 9045604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4060225 + 5184 = 2015^2 + 72^2 .

It is a cyclic number.

It is not a de Polignac number, because 4065409 - 2⁵ = 4065377 is a prime.

It is not a weakly prime, because it can be changed into another prime (4065403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2032704 + 2032705.

It is an arithmetic number, because the mean of its divisors is an integer number (2032705).

Almost surely, 2^4065409 is an apocalyptic number.

It is an amenable number.

4065409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4065409 is an equidigital number, since it uses as much as digits as its factorization.

4065409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 4065409 is about 2016.2859420231. The cubic root of 4065409 is about 159.6006839333.

The spelling of 4065409 in words is "four million, sixty-five thousand, four hundred nine".