4221378 has 24 divisors (see below), whose sum is σ = 10453248. Its totient is φ = 1206072.

The previous prime is 4221361. The next prime is 4221379. The reversal of 4221378 is 8731224.

It is not an unprimeable number, because it can be changed into a prime (4221379) 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, 16626 + ... + 16877.

It is an arithmetic number, because the mean of its divisors is an integer number (435552).

Almost surely, 2^4221378 is an apocalyptic number.

4221378 is an abundant number, since it is smaller than the sum of its proper divisors (6231870).

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

4221378 is a wasteful number, since it uses less digits than its factorization.

4221378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33518 (or 33515 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 4221378 is about 2054.5992309937. The cubic root of 4221378 is about 161.6161465175.

The spelling of 4221378 in words is "four million, two hundred twenty-one thousand, three hundred seventy-eight".