4065541 has 2 divisors, whose sum is σ = 4065542. Its totient is φ = 4065540.

The previous prime is 4065527. The next prime is 4065569. The reversal of 4065541 is 1455604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3940225 + 125316 = 1985^2 + 354^2 .

It is a cyclic number.

It is not a de Polignac number, because 4065541 - 2⁹ = 4065029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4065571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2032770 + 2032771.

It is an arithmetic number, because the mean of its divisors is an integer number (2032771).

Almost surely, 2^4065541 is an apocalyptic number.

It is an amenable number.

4065541 is a deficient number, since it is larger than the sum of its proper divisors (1).

4065541 is an equidigital number, since it uses as much as digits as its factorization.

4065541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 4065541 is about 2016.3186752098. The cubic root of 4065541 is about 159.6024112759.

The spelling of 4065541 in words is "four million, sixty-five thousand, five hundred forty-one".