4057409 has 2 divisors, whose sum is σ = 4057410. Its totient is φ = 4057408.

The previous prime is 4057397. The next prime is 4057423. The reversal of 4057409 is 9047504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2166784 + 1890625 = 1472^2 + 1375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4057409 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4057909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2028704 + 2028705.

It is an arithmetic number, because the mean of its divisors is an integer number (2028705).

Almost surely, 2^4057409 is an apocalyptic number.

It is an amenable number.

4057409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4057409 is an equidigital number, since it uses as much as digits as its factorization.

4057409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 4057409 is about 2014.3011194953. The cubic root of 4057409 is about 159.4959266263.

The spelling of 4057409 in words is "four million, fifty-seven thousand, four hundred nine".