12173138 has 4 divisors (see below), whose sum is σ = 18259710. Its totient is φ = 6086568.

The previous prime is 12173113. The next prime is 12173143. The reversal of 12173138 is 83137121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83137121 = 127 ⋅654623.

It can be written as a sum of positive squares in only one way, i.e., 7006609 + 5166529 = 2647^2 + 2273^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3043283 + ... + 3043286.

Almost surely, 2^12173138 is an apocalyptic number.

12173138 is a deficient number, since it is larger than the sum of its proper divisors (6086572).

12173138 is an equidigital number, since it uses as much as digits as its factorization.

12173138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6086571.

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

The square root of 12173138 is about 3489.0024362273. The cubic root of 12173138 is about 230.0386702465.

The spelling of 12173138 in words is "twelve million, one hundred seventy-three thousand, one hundred thirty-eight".