12138137 has 4 divisors (see below), whose sum is σ = 13241616. Its totient is φ = 11034660.

The previous prime is 12138127. The next prime is 12138151. The reversal of 12138137 is 73183121.

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: 73183121 = 11 ⋅6653011.

It is a cyclic number.

It is not a de Polignac number, because 12138137 - 2⁶ = 12138073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12138107) 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, 551723 + ... + 551744.

It is an arithmetic number, because the mean of its divisors is an integer number (3310404).

Almost surely, 2^12138137 is an apocalyptic number.

It is an amenable number.

12138137 is a deficient number, since it is larger than the sum of its proper divisors (1103479).

12138137 is a wasteful number, since it uses less digits than its factorization.

12138137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103478.

The product of its digits is 1008, while the sum is 26.

The square root of 12138137 is about 3483.9829218870. The cubic root of 12138137 is about 229.8179845406.

The spelling of 12138137 in words is "twelve million, one hundred thirty-eight thousand, one hundred thirty-seven".