12289305 has 16 divisors (see below), whose sum is σ = 22472064. Its totient is φ = 5617920.

The previous prime is 12289297. The next prime is 12289309. The reversal of 12289305 is 50398221.

It is a happy number.

12289305 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12289305 - 2³ = 12289297 is a prime.

12289305 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (12289309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58416 + ... + 58625.

It is an arithmetic number, because the mean of its divisors is an integer number (1404504).

Almost surely, 2^12289305 is an apocalyptic number.

12289305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12289305 is a deficient number, since it is larger than the sum of its proper divisors (10182759).

12289305 is a wasteful number, since it uses less digits than its factorization.

12289305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117056.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 12289305 is about 3505.6105031792. The cubic root of 12289305 is about 230.7680999517.

The spelling of 12289305 in words is "twelve million, two hundred eighty-nine thousand, three hundred five".