4221805 has 8 divisors (see below), whose sum is σ = 5789952. Its totient is φ = 2894928.

The previous prime is 4221799. The next prime is 4221827. The reversal of 4221805 is 5081224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4221805 - 2⁷ = 4221677 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 60277 + ... + 60346.

It is an arithmetic number, because the mean of its divisors is an integer number (723744).

Almost surely, 2^4221805 is an apocalyptic number.

It is an amenable number.

4221805 is a deficient number, since it is larger than the sum of its proper divisors (1568147).

4221805 is a wasteful number, since it uses less digits than its factorization.

4221805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120635.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 4221805 is about 2054.7031415754. The cubic root of 4221805 is about 161.6215955887.

The spelling of 4221805 in words is "four million, two hundred twenty-one thousand, eight hundred five".