14218409 has 4 divisors (see below), whose sum is σ = 15054804. Its totient is φ = 13382016.

The previous prime is 14218343. The next prime is 14218417. The reversal of 14218409 is 90481241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5895184 + 8323225 = 2428^2 + 2885^2 .

It is a cyclic number.

It is not a de Polignac number, because 14218409 - 2⁸ = 14218153 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (14218709) 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, 418172 + ... + 418205.

It is an arithmetic number, because the mean of its divisors is an integer number (3763701).

Almost surely, 2^14218409 is an apocalyptic number.

It is an amenable number.

14218409 is a deficient number, since it is larger than the sum of its proper divisors (836395).

14218409 is an equidigital number, since it uses as much as digits as its factorization.

14218409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836394.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 14218409 is about 3770.7305658188. The cubic root of 14218409 is about 242.2610903860.

The spelling of 14218409 in words is "fourteen million, two hundred eighteen thousand, four hundred nine".