4221718 has 4 divisors (see below), whose sum is σ = 6332580. Its totient is φ = 2110858.

The previous prime is 4221713. The next prime is 4221751. The reversal of 4221718 is 8171224.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 4221692 and 4221701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055428 + ... + 1055431.

It is an arithmetic number, because the mean of its divisors is an integer number (1583145).

Almost surely, 2^4221718 is an apocalyptic number.

4221718 is a deficient number, since it is larger than the sum of its proper divisors (2110862).

4221718 is a wasteful number, since it uses less digits than its factorization.

4221718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110861.

The product of its digits is 896, while the sum is 25.

The square root of 4221718 is about 2054.6819705249. The cubic root of 4221718 is about 161.6204853862.

The spelling of 4221718 in words is "four million, two hundred twenty-one thousand, seven hundred eighteen".