4218009 has 8 divisors (see below), whose sum is σ = 5635872. Its totient is φ = 2806080.

The previous prime is 4218007. The next prime is 4218031. The reversal of 4218009 is 9008124.

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

It is not a de Polignac number, because 4218009 - 2¹ = 4218007 is a prime.

It is an Ulam number.

4218009 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4218009.

It is not an unprimeable number, because it can be changed into a prime (4218001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594 + ... + 2964.

It is an arithmetic number, because the mean of its divisors is an integer number (704484).

Almost surely, 2^4218009 is an apocalyptic number.

It is an amenable number.

4218009 is a deficient number, since it is larger than the sum of its proper divisors (1417863).

4218009 is a wasteful number, since it uses less digits than its factorization.

4218009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 4218009 is about 2053.7791994272. The cubic root of 4218009 is about 161.5731408363.

The spelling of 4218009 in words is "four million, two hundred eighteen thousand, nine".