12905189 has 4 divisors (see below), whose sum is σ = 14078400. Its totient is φ = 11731980.

The previous prime is 12905183. The next prime is 12905209. The reversal of 12905189 is 98150921.

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: 98150921 = 11 ⋅8922811.

It is a cyclic number.

It is not a de Polignac number, because 12905189 - 2¹² = 12901093 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 (12905183) 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 3 ways as a sum of consecutive naturals, for example, 586589 + ... + 586610.

It is an arithmetic number, because the mean of its divisors is an integer number (3519600).

Almost surely, 2^12905189 is an apocalyptic number.

It is an amenable number.

12905189 is a deficient number, since it is larger than the sum of its proper divisors (1173211).

12905189 is a wasteful number, since it uses less digits than its factorization.

12905189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173210.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 12905189 is about 3592.3792951190. The cubic root of 12905189 is about 234.5604519521.

The spelling of 12905189 in words is "twelve million, nine hundred five thousand, one hundred eighty-nine".