12389745 has 8 divisors (see below), whose sum is σ = 19823616. Its totient is φ = 6607856.

The previous prime is 12389737. The next prime is 12389747. The reversal of 12389745 is 54798321.

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 12389745 - 2³ = 12389737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12389747) 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, 412977 + ... + 413006.

It is an arithmetic number, because the mean of its divisors is an integer number (2477952).

Almost surely, 2^12389745 is an apocalyptic number.

12389745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12389745 is a deficient number, since it is larger than the sum of its proper divisors (7433871).

12389745 is an equidigital number, since it uses as much as digits as its factorization.

12389745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825991.

The product of its digits is 60480, while the sum is 39.

The square root of 12389745 is about 3519.9069589976. The cubic root of 12389745 is about 231.3950811054.

The spelling of 12389745 in words is "twelve million, three hundred eighty-nine thousand, seven hundred forty-five".