12538187 has 4 divisors (see below), whose sum is σ = 12579336. Its totient is φ = 12497040.

The previous prime is 12538181. The next prime is 12538199. The reversal of 12538187 is 78183521.

12538187 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78183521 = 13 ⋅6014117.

It is a cyclic number.

It is not a de Polignac number, because 12538187 - 2⁴ = 12538171 is a prime.

It is a super-2 number, since 2×12538187² = 314412266493938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12538181) 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, 20114 + ... + 20727.

It is an arithmetic number, because the mean of its divisors is an integer number (3144834).

Almost surely, 2^12538187 is an apocalyptic number.

12538187 is a deficient number, since it is larger than the sum of its proper divisors (41149).

12538187 is an equidigital number, since it uses as much as digits as its factorization.

12538187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41148.

The product of its digits is 13440, while the sum is 35.

The square root of 12538187 is about 3540.9302450062. The cubic root of 12538187 is about 232.3155325646.

The spelling of 12538187 in words is "twelve million, five hundred thirty-eight thousand, one hundred eighty-seven".