4221706 has 4 divisors (see below), whose sum is σ = 6332562. Its totient is φ = 2110852.

The previous prime is 4221703. The next prime is 4221713. The reversal of 4221706 is 6071224.

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

It can be written as a sum of positive squares in only one way, i.e., 3744225 + 477481 = 1935^2 + 691^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4221703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055425 + ... + 1055428.

Almost surely, 2^4221706 is an apocalyptic number.

4221706 is a deficient number, since it is larger than the sum of its proper divisors (2110856).

4221706 is a wasteful number, since it uses less digits than its factorization.

4221706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110855.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 4221706 is about 2054.6790503629. The cubic root of 4221706 is about 161.6203322537.

The spelling of 4221706 in words is "four million, two hundred twenty-one thousand, seven hundred six".