4218609 has 8 divisors (see below), whose sum is σ = 5641920. Its totient is φ = 2803856.

The previous prime is 4218583. The next prime is 4218623. The reversal of 4218609 is 9068124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4218609 - 2⁸ = 4218353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4218509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 882 + ... + 3035.

It is an arithmetic number, because the mean of its divisors is an integer number (705240).

Almost surely, 2^4218609 is an apocalyptic number.

It is an amenable number.

4218609 is a deficient number, since it is larger than the sum of its proper divisors (1423311).

4218609 is a wasteful number, since it uses less digits than its factorization.

4218609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4279.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 4218609 is about 2053.9252664106. The cubic root of 4218609 is about 161.5808015825.

The spelling of 4218609 in words is "four million, two hundred eighteen thousand, six hundred nine".