12438194 has 4 divisors (see below), whose sum is σ = 18657294. Its totient is φ = 6219096.

The previous prime is 12438191. The next prime is 12438197. The reversal of 12438194 is 49183421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49183421 = 7 ⋅7026203.

It is an interprime number because it is at equal distance from previous prime (12438191) and next prime (12438197).

It can be written as a sum of positive squares in only one way, i.e., 7317025 + 5121169 = 2705^2 + 2263^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12438194.

It is not an unprimeable number, because it can be changed into a prime (12438191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3109547 + ... + 3109550.

Almost surely, 2^12438194 is an apocalyptic number.

12438194 is a deficient number, since it is larger than the sum of its proper divisors (6219100).

12438194 is an equidigital number, since it uses as much as digits as its factorization.

12438194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6219099.

The product of its digits is 6912, while the sum is 32.

The square root of 12438194 is about 3526.7823862552. The cubic root of 12438194 is about 231.6963054627.

The spelling of 12438194 in words is "twelve million, four hundred thirty-eight thousand, one hundred ninety-four".