4221918 has 24 divisors (see below), whose sum is σ = 9266400. Its totient is φ = 1389024.

The previous prime is 4221913. The next prime is 4221923. The reversal of 4221918 is 8191224.

4221918 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4221913) and next prime (4221923).

It is a junction number, because it is equal to n+sod(n) for n = 4221891 and 4221900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63 + ... + 2906.

It is an arithmetic number, because the mean of its divisors is an integer number (386100).

Almost surely, 2^4221918 is an apocalyptic number.

4221918 is an abundant number, since it is smaller than the sum of its proper divisors (5044482).

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

4221918 is a wasteful number, since it uses less digits than its factorization.

4221918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056 (or 3053 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 4221918 is about 2054.7306392810. The cubic root of 4221918 is about 161.6230375531.

The spelling of 4221918 in words is "four million, two hundred twenty-one thousand, nine hundred eighteen".