4209409 has 4 divisors (see below), whose sum is σ = 4272304. Its totient is φ = 4146516.

The previous prime is 4209407. The next prime is 4209451. The reversal of 4209409 is 9049024.

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 not a de Polignac number, because 4209409 - 2¹ = 4209407 is a prime.

It is a Duffinian number.

4209409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4209407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31347 + ... + 31480.

It is an arithmetic number, because the mean of its divisors is an integer number (1068076).

Almost surely, 2^4209409 is an apocalyptic number.

It is an amenable number.

4209409 is a deficient number, since it is larger than the sum of its proper divisors (62895).

4209409 is an equidigital number, since it uses as much as digits as its factorization.

4209409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62894.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 4209409 is about 2051.6844299258. The cubic root of 4209409 is about 161.4632568886.

The spelling of 4209409 in words is "four million, two hundred nine thousand, four hundred nine".