7221106 has 4 divisors (see below), whose sum is σ = 10831662. Its totient is φ = 3610552.

The previous prime is 7221101. The next prime is 7221131. The reversal of 7221106 is 6011227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6011227 = 439 ⋅13693.

It can be written as a sum of positive squares in only one way, i.e., 7209225 + 11881 = 2685^2 + 109^2 .

It is not an unprimeable number, because it can be changed into a prime (7221101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1805275 + ... + 1805278.

Almost surely, 2^7221106 is an apocalyptic number.

7221106 is a deficient number, since it is larger than the sum of its proper divisors (3610556).

7221106 is a wasteful number, since it uses less digits than its factorization.

7221106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610555.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 7221106 is about 2687.2115659174. The cubic root of 7221106 is about 193.2863745113.

The spelling of 7221106 in words is "seven million, two hundred twenty-one thousand, one hundred six".