12204309 has 8 divisors (see below), whose sum is σ = 17524192. Its totient is φ = 7510320.

The previous prime is 12204281. The next prime is 12204323. The reversal of 12204309 is 90340221.

12204309 = T₃₉₇ + T₃₉₈ + ... + T₅₁₃.

12204309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-12204309 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12204109) 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, 156427 + ... + 156504.

It is an arithmetic number, because the mean of its divisors is an integer number (2190524).

Almost surely, 2^12204309 is an apocalyptic number.

It is an amenable number.

12204309 is a deficient number, since it is larger than the sum of its proper divisors (5319883).

12204309 is a wasteful number, since it uses less digits than its factorization.

12204309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312947.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 12204309 is about 3493.4666164141. The cubic root of 12204309 is about 230.2348514804.

The spelling of 12204309 in words is "twelve million, two hundred four thousand, three hundred nine".