7112209 has 4 divisors (see below), whose sum is σ = 7659316. Its totient is φ = 6565104.

The previous prime is 7112201. The next prime is 7112227. The reversal of 7112209 is 9022117.

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 2689600 + 4422609 = 1640^2 + 2103^2 .

It is not a de Polignac number, because 7112209 - 2³ = 7112201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7112209.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7112201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273534 + ... + 273559.

It is an arithmetic number, because the mean of its divisors is an integer number (1914829).

Almost surely, 2^7112209 is an apocalyptic number.

It is an amenable number.

7112209 is a deficient number, since it is larger than the sum of its proper divisors (547107).

7112209 is a wasteful number, since it uses less digits than its factorization.

7112209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547106.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 7112209 is about 2666.8725128885. The cubic root of 7112209 is about 192.3098386345.

The spelling of 7112209 in words is "seven million, one hundred twelve thousand, two hundred nine".