4045409 has 4 divisors (see below), whose sum is σ = 4052016. Its totient is φ = 4038804.

The previous prime is 4045399. The next prime is 4045417. The reversal of 4045409 is 9045404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4045409 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4045009) 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 in 3 ways as a sum of consecutive naturals, for example, 2279 + ... + 3644.

It is an arithmetic number, because the mean of its divisors is an integer number (1013004).

Almost surely, 2^4045409 is an apocalyptic number.

It is an amenable number.

4045409 is a deficient number, since it is larger than the sum of its proper divisors (6607).

4045409 is an equidigital number, since it uses as much as digits as its factorization.

4045409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6606.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 4045409 is about 2011.3202131933. The cubic root of 4045409 is about 159.3385321662.

The spelling of 4045409 in words is "four million, forty-five thousand, four hundred nine".