4221817 has 4 divisors (see below), whose sum is σ = 4233060. Its totient is φ = 4210576.

The previous prime is 4221799. The next prime is 4221827. The reversal of 4221817 is 7181224.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1610361 + 2611456 = 1269^2 + 1616^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221817 - 2¹¹ = 4219769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4221791 and 4221800.

It is not an unprimeable number, because it can be changed into a prime (4221827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5038 + ... + 5815.

It is an arithmetic number, because the mean of its divisors is an integer number (1058265).

Almost surely, 2^4221817 is an apocalyptic number.

It is an amenable number.

4221817 is a deficient number, since it is larger than the sum of its proper divisors (11243).

4221817 is a wasteful number, since it uses less digits than its factorization.

4221817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11242.

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

The square root of 4221817 is about 2054.7060617032. The cubic root of 4221817 is about 161.6217487189.

The spelling of 4221817 in words is "four million, two hundred twenty-one thousand, eight hundred seventeen".