4221616 has 20 divisors (see below), whose sum is σ = 9348112. Its totient is φ = 1809216.

The previous prime is 4221583. The next prime is 4221619. The reversal of 4221616 is 6161224.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4221619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18735 + ... + 18958.

Almost surely, 2^4221616 is an apocalyptic number.

It is an amenable number.

4221616 is an abundant number, since it is smaller than the sum of its proper divisors (5126496).

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

4221616 is a wasteful number, since it uses less digits than its factorization.

4221616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37708 (or 37702 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 4221616 is about 2054.6571490154. The cubic root of 4221616 is about 161.6191837501.

The spelling of 4221616 in words is "four million, two hundred twenty-one thousand, six hundred sixteen".