8221706 has 4 divisors (see below), whose sum is σ = 12332562. Its totient is φ = 4110852.

The previous prime is 8221669. The next prime is 8221721. The reversal of 8221706 is 6071228.

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., 7980625 + 241081 = 2825^2 + 491^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2055425 + ... + 2055428.

Almost surely, 2^8221706 is an apocalyptic number.

8221706 is a deficient number, since it is larger than the sum of its proper divisors (4110856).

8221706 is a wasteful number, since it uses less digits than its factorization.

8221706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110855.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 8221706 is about 2867.3517398464. The cubic root of 8221706 is about 201.8307408077.

The spelling of 8221706 in words is "eight million, two hundred twenty-one thousand, seven hundred six".