4218665 has 24 divisors (see below), whose sum is σ = 5873280. Its totient is φ = 2898720.

The previous prime is 4218631. The next prime is 4218667. The reversal of 4218665 is 5668124.

It is not a de Polignac number, because 4218665 - 2¹² = 4214569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4218667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11312 + ... + 11678.

It is an arithmetic number, because the mean of its divisors is an integer number (244720).

Almost surely, 2^4218665 is an apocalyptic number.

It is an amenable number.

4218665 is a deficient number, since it is larger than the sum of its proper divisors (1654615).

4218665 is a wasteful number, since it uses less digits than its factorization.

4218665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 402 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 4218665 is about 2053.9388987991. The cubic root of 4218665 is about 161.5815165484.

The spelling of 4218665 in words is "four million, two hundred eighteen thousand, six hundred sixty-five".