12157189 has 8 divisors (see below), whose sum is σ = 13302432. Its totient is φ = 11018640.

The previous prime is 12157153. The next prime is 12157199. The reversal of 12157189 is 98175121.

12157189 = T₄₅ + T₄₆ + ... + T₄₁₇.

It is a happy number.

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 12157189 - 2¹⁷ = 12026117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12157129) 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, 2622 + ... + 5584.

It is an arithmetic number, because the mean of its divisors is an integer number (1662804).

Almost surely, 2^12157189 is an apocalyptic number.

It is an amenable number.

12157189 is a deficient number, since it is larger than the sum of its proper divisors (1145243).

12157189 is a wasteful number, since it uses less digits than its factorization.

12157189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347.

The product of its digits is 5040, while the sum is 34.

The square root of 12157189 is about 3486.7160767691. The cubic root of 12157189 is about 229.9381623299.

The spelling of 12157189 in words is "twelve million, one hundred fifty-seven thousand, one hundred eighty-nine".