12487189 has 8 divisors (see below), whose sum is σ = 14670432. Its totient is φ = 10478640.

The previous prime is 12487187. The next prime is 12487193. The reversal of 12487189 is 98178421.

It is a happy number.

12487189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12487189 - 2¹ = 12487187 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 (12487187) 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, 43519 + ... + 43804.

It is an arithmetic number, because the mean of its divisors is an integer number (1833804).

Almost surely, 2^12487189 is an apocalyptic number.

It is an amenable number.

12487189 is a deficient number, since it is larger than the sum of its proper divisors (2183243).

12487189 is a wasteful number, since it uses less digits than its factorization.

12487189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87347.

The product of its digits is 32256, while the sum is 40.

The square root of 12487189 is about 3533.7216924936. The cubic root of 12487189 is about 232.0001300534. Note that the first 3 decimals are identical.

The spelling of 12487189 in words is "twelve million, four hundred eighty-seven thousand, one hundred eighty-nine".