7001209 has 4 divisors (see below), whose sum is σ = 7242660. Its totient is φ = 6759760.

The previous prime is 7001123. The next prime is 7001213. The reversal of 7001209 is 9021007.

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 3861225 + 3139984 = 1965^2 + 1772^2 .

It is a cyclic number.

It is not a de Polignac number, because 7001209 - 2²¹ = 4904057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7001249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120682 + ... + 120739.

It is an arithmetic number, because the mean of its divisors is an integer number (1810665).

Almost surely, 2^7001209 is an apocalyptic number.

It is an amenable number.

7001209 is a deficient number, since it is larger than the sum of its proper divisors (241451).

7001209 is a wasteful number, since it uses less digits than its factorization.

7001209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241450.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 7001209 is about 2645.9797807240. The cubic root of 7001209 is about 191.3041306614.

The spelling of 7001209 in words is "seven million, one thousand, two hundred nine".