7122009 has 8 divisors (see below), whose sum is σ = 9508480. Its totient is φ = 4741776.

The previous prime is 7122007. The next prime is 7122013. The reversal of 7122009 is 9002217.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7122009 - 2¹ = 7122007 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7122001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3087 + ... + 4875.

It is an arithmetic number, because the mean of its divisors is an integer number (1188560).

Almost surely, 2^7122009 is an apocalyptic number.

It is an amenable number.

7122009 is a deficient number, since it is larger than the sum of its proper divisors (2386471).

7122009 is a wasteful number, since it uses less digits than its factorization.

7122009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3119.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 7122009 is about 2668.7092385646. The cubic root of 7122009 is about 192.3981267908.

The spelling of 7122009 in words is "seven million, one hundred twenty-two thousand, nine".