12418139 has 4 divisors (see below), whose sum is σ = 12430080. Its totient is φ = 12406200.

The previous prime is 12418117. The next prime is 12418141. The reversal of 12418139 is 93181421.

12418139 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: 93181421 = 1831 ⋅50891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12418139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12418339) 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, 4244 + ... + 6545.

It is an arithmetic number, because the mean of its divisors is an integer number (3107520).

Almost surely, 2^12418139 is an apocalyptic number.

12418139 is a deficient number, since it is larger than the sum of its proper divisors (11941).

12418139 is a wasteful number, since it uses less digits than its factorization.

12418139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11940.

The product of its digits is 1728, while the sum is 29.

The square root of 12418139 is about 3523.9379960493. The cubic root of 12418139 is about 231.5717115698.

The spelling of 12418139 in words is "twelve million, four hundred eighteen thousand, one hundred thirty-nine".