7201209 has 8 divisors (see below), whose sum is σ = 10107040. Its totient is φ = 4548096.

The previous prime is 7201189. The next prime is 7201211. The reversal of 7201209 is 9021027.

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 7201209 - 2²⁰ = 6152633 is a prime.

It is a super-2 number, since 2×7201209² = 103714822123362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7201279) 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, 63112 + ... + 63225.

It is an arithmetic number, because the mean of its divisors is an integer number (1263380).

Almost surely, 2^7201209 is an apocalyptic number.

It is an amenable number.

7201209 is a deficient number, since it is larger than the sum of its proper divisors (2905831).

7201209 is a wasteful number, since it uses less digits than its factorization.

7201209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126359.

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

The square root of 7201209 is about 2683.5068473920. The cubic root of 7201209 is about 193.1086844335.

The spelling of 7201209 in words is "seven million, two hundred one thousand, two hundred nine".