4218621 has 8 divisors (see below), whose sum is σ = 6136224. Its totient is φ = 2556720.

The previous prime is 4218583. The next prime is 4218623. The reversal of 4218621 is 1268124.

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

It is not a de Polignac number, because 4218621 - 2¹⁰ = 4217597 is a prime.

It is a super-3 number, since 3×4218621³ (a number of 21 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4218591 and 4218600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4218623) 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 7 ways as a sum of consecutive naturals, for example, 63886 + ... + 63951.

It is an arithmetic number, because the mean of its divisors is an integer number (767028).

Almost surely, 2^4218621 is an apocalyptic number.

It is an amenable number.

4218621 is a deficient number, since it is larger than the sum of its proper divisors (1917603).

4218621 is a wasteful number, since it uses less digits than its factorization.

4218621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127851.

The product of its digits is 768, while the sum is 24.

The square root of 4218621 is about 2053.9281876443. The cubic root of 4218621 is about 161.5809547900.

The spelling of 4218621 in words is "four million, two hundred eighteen thousand, six hundred twenty-one".