12805189 has 4 divisors (see below), whose sum is σ = 12967360. Its totient is φ = 12643020.

The previous prime is 12805187. The next prime is 12805193. The reversal of 12805189 is 98150821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98150821 = 23 ⋅4267427.

It is a cyclic number.

It is not a de Polignac number, because 12805189 - 2¹ = 12805187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12805187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80967 + ... + 81124.

It is an arithmetic number, because the mean of its divisors is an integer number (3241840).

Almost surely, 2^12805189 is an apocalyptic number.

It is an amenable number.

12805189 is a deficient number, since it is larger than the sum of its proper divisors (162171).

12805189 is an equidigital number, since it uses as much as digits as its factorization.

12805189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162170.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 12805189 is about 3578.4338753147. The cubic root of 12805189 is about 233.9530246366.

The spelling of 12805189 in words is "twelve million, eight hundred five thousand, one hundred eighty-nine".