12138873 has 4 divisors (see below), whose sum is σ = 16185168. Its totient is φ = 8092580.

The previous prime is 12138869. The next prime is 12138937. The reversal of 12138873 is 37883121.

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: 37883121 = 3 ⋅12627707.

It is a cyclic number.

It is not a de Polignac number, because 12138873 - 2² = 12138869 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12138803) 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, 2023143 + ... + 2023148.

It is an arithmetic number, because the mean of its divisors is an integer number (4046292).

Almost surely, 2^12138873 is an apocalyptic number.

It is an amenable number.

12138873 is a deficient number, since it is larger than the sum of its proper divisors (4046295).

12138873 is an equidigital number, since it uses as much as digits as its factorization.

12138873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046294.

The product of its digits is 8064, while the sum is 33.

The square root of 12138873 is about 3484.0885465212. The cubic root of 12138873 is about 229.8226294768.

The spelling of 12138873 in words is "twelve million, one hundred thirty-eight thousand, eight hundred seventy-three".