7212109 has 8 divisors (see below), whose sum is σ = 7371648. Its totient is φ = 7054320.

The previous prime is 7212083. The next prime is 7212157. The reversal of 7212109 is 9012127.

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 7212109 - 2¹¹ = 7210061 is a prime.

It is an alternating number because its digits alternate between odd and even.

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 7212109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7212169) by changing a digit.

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, 10824 + ... + 11470.

It is an arithmetic number, because the mean of its divisors is an integer number (921456).

Almost surely, 2^7212109 is an apocalyptic number.

It is an amenable number.

7212109 is a deficient number, since it is larger than the sum of its proper divisors (159539).

7212109 is a wasteful number, since it uses less digits than its factorization.

7212109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875.

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

The square root of 7212109 is about 2685.5370040273. The cubic root of 7212109 is about 193.2060673194.

The spelling of 7212109 in words is "seven million, two hundred twelve thousand, one hundred nine".