12845989 has 8 divisors (see below), whose sum is σ = 13896792. Its totient is φ = 11804160.

The previous prime is 12845969. The next prime is 12846007. The reversal of 12845989 is 98954821.

It can be written as a sum of positive squares in 4 ways, for example, as 1677025 + 11168964 = 1295^2 + 3342^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12845989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12845909) 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, 909 + ... + 5149.

It is an arithmetic number, because the mean of its divisors is an integer number (1737099).

Almost surely, 2^12845989 is an apocalyptic number.

It is an amenable number.

12845989 is a deficient number, since it is larger than the sum of its proper divisors (1050803).

12845989 is a wasteful number, since it uses less digits than its factorization.

12845989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4487.

The product of its digits is 207360, while the sum is 46.

The square root of 12845989 is about 3584.1301594669. The cubic root of 12845989 is about 234.2012355652.

The spelling of 12845989 in words is "twelve million, eight hundred forty-five thousand, nine hundred eighty-nine".