7209985 has 8 divisors (see below), whose sum is σ = 8672040. Its totient is φ = 5754624.

The previous prime is 7209947. The next prime is 7210001. The reversal of 7209985 is 5899027.

It can be written as a sum of positive squares in 4 ways, for example, as 1290496 + 5919489 = 1136^2 + 2433^2 .

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 7209985 - 2¹³ = 7201793 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1129 + ... + 3961.

It is an arithmetic number, because the mean of its divisors is an integer number (1084005).

Almost surely, 2^7209985 is an apocalyptic number.

It is an amenable number.

7209985 is a deficient number, since it is larger than the sum of its proper divisors (1462055).

7209985 is a wasteful number, since it uses less digits than its factorization.

7209985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 7209985 is about 2685.1415232721. The cubic root of 7209985 is about 193.1870987589.

The spelling of 7209985 in words is "seven million, two hundred nine thousand, nine hundred eighty-five".