12445889 has 2 divisors, whose sum is σ = 12445890. Its totient is φ = 12445888.

The previous prime is 12445883. The next prime is 12445907. The reversal of 12445889 is 98854421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6589489 + 5856400 = 2567^2 + 2420^2 .

It is an emirp because it is prime and its reverse (98854421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12445889 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (12445883) 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 as a sum of consecutive naturals, namely, 6222944 + 6222945.

It is an arithmetic number, because the mean of its divisors is an integer number (6222945).

Almost surely, 2^12445889 is an apocalyptic number.

It is an amenable number.

12445889 is a deficient number, since it is larger than the sum of its proper divisors (1).

12445889 is an equidigital number, since it uses as much as digits as its factorization.

12445889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 41.

The square root of 12445889 is about 3527.8731553161. The cubic root of 12445889 is about 231.7440759436.

The spelling of 12445889 in words is "twelve million, four hundred forty-five thousand, eight hundred eighty-nine".