12305189 has 8 divisors (see below), whose sum is σ = 13338360. Its totient is φ = 11284416.

The previous prime is 12305177. The next prime is 12305191. The reversal of 12305189 is 98150321.

It can be written as a sum of positive squares in 4 ways, for example, as 1481089 + 10824100 = 1217^2 + 3290^2 .

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

It is not a de Polignac number, because 12305189 - 2²⁰ = 11256613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12305149) 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 7 ways as a sum of consecutive naturals, for example, 974 + ... + 5055.

It is an arithmetic number, because the mean of its divisors is an integer number (1667295).

Almost surely, 2^12305189 is an apocalyptic number.

It is an amenable number.

12305189 is a deficient number, since it is larger than the sum of its proper divisors (1033171).

12305189 is a wasteful number, since it uses less digits than its factorization.

12305189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6199.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 12305189 is about 3507.8752828457. The cubic root of 12305189 is about 230.8674801960.

The spelling of 12305189 in words is "twelve million, three hundred five thousand, one hundred eighty-nine".