4221138 has 16 divisors (see below), whose sum is σ = 8639136. Its totient is φ = 1374240.

The previous prime is 4221109. The next prime is 4221169. The reversal of 4221138 is 8311224.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7923 + ... + 8438.

It is an arithmetic number, because the mean of its divisors is an integer number (539946).

Almost surely, 2^4221138 is an apocalyptic number.

4221138 is an abundant number, since it is smaller than the sum of its proper divisors (4417998).

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

4221138 is a wasteful number, since it uses less digits than its factorization.

4221138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16409.

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

The square root of 4221138 is about 2054.5408246126. The cubic root of 4221138 is about 161.6130836464.

The spelling of 4221138 in words is "four million, two hundred twenty-one thousand, one hundred thirty-eight".