14981209 has 4 divisors (see below), whose sum is σ = 15000804. Its totient is φ = 14961616.

The previous prime is 14981207. The next prime is 14981227. The reversal of 14981209 is 90218941.

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 10017225 + 4963984 = 3165^2 + 2228^2 .

It is a cyclic number.

It is not a de Polignac number, because 14981209 - 2¹ = 14981207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14981207) 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 3 ways as a sum of consecutive naturals, for example, 8602 + ... + 10195.

It is an arithmetic number, because the mean of its divisors is an integer number (3750201).

Almost surely, 2^14981209 is an apocalyptic number.

It is an amenable number.

14981209 is a deficient number, since it is larger than the sum of its proper divisors (19595).

14981209 is an equidigital number, since it uses as much as digits as its factorization.

14981209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19594.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 14981209 is about 3870.5566783087. The cubic root of 14981209 is about 246.5181808637.

The spelling of 14981209 in words is "fourteen million, nine hundred eighty-one thousand, two hundred nine".