4221318 has 16 divisors (see below), whose sum is σ = 8479296. Its totient is φ = 1401000.

The previous prime is 4221313. The next prime is 4221323. The reversal of 4221318 is 8131224.

It is an interprime number because it is at equal distance from previous prime (4221313) and next prime (4221323).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4221294 and 4221303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221311) 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, 105 + ... + 2907.

It is an arithmetic number, because the mean of its divisors is an integer number (529956).

Almost surely, 2^4221318 is an apocalyptic number.

4221318 is an abundant number, since it is smaller than the sum of its proper divisors (4257978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4221318 is a wasteful number, since it uses less digits than its factorization.

4221318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059.

The product of its digits is 384, while the sum is 21.

The square root of 4221318 is about 2054.5846295541. The cubic root of 4221318 is about 161.6153808106.

The spelling of 4221318 in words is "four million, two hundred twenty-one thousand, three hundred eighteen".