12238139 has 4 divisors (see below), whose sum is σ = 12770256. Its totient is φ = 11706024.

The previous prime is 12238133. The next prime is 12238141. The reversal of 12238139 is 93183221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12238139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12238133) 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, 266024 + ... + 266069.

It is an arithmetic number, because the mean of its divisors is an integer number (3192564).

Almost surely, 2^12238139 is an apocalyptic number.

12238139 is a deficient number, since it is larger than the sum of its proper divisors (532117).

12238139 is an equidigital number, since it uses as much as digits as its factorization.

12238139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532116.

The product of its digits is 2592, while the sum is 29.

The square root of 12238139 is about 3498.3051610744. The cubic root of 12238139 is about 230.4473900537.

The spelling of 12238139 in words is "twelve million, two hundred thirty-eight thousand, one hundred thirty-nine".