12138019 has 8 divisors (see below), whose sum is σ = 12579840. Its totient is φ = 11699400.

The previous prime is 12138001. The next prime is 12138023. The reversal of 12138019 is 91083121.

12138019 is digitally balanced in base 2 and base 3, because in such bases 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 de Polignac number, because none of the positive numbers 2^k-12138019 is a prime.

It is a super-2 number, since 2×12138019² = 294663010488722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12137984 and 12138002.

It is not an unprimeable number, because it can be changed into a prime (12138029) 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, 9012 + ... + 10270.

It is an arithmetic number, because the mean of its divisors is an integer number (1572480).

Almost surely, 2^12138019 is an apocalyptic number.

12138019 is a deficient number, since it is larger than the sum of its proper divisors (441821).

12138019 is a wasteful number, since it uses less digits than its factorization.

12138019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 12138019 is about 3483.9659872048. The cubic root of 12138019 is about 229.8172398186.

The spelling of 12138019 in words is "twelve million, one hundred thirty-eight thousand, nineteen".