12225139 has 4 divisors (see below), whose sum is σ = 12455856. Its totient is φ = 11994424.

The previous prime is 12225107. The next prime is 12225149. The reversal of 12225139 is 93152221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12225139 - 2⁵ = 12225107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12225149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115279 + ... + 115384.

It is an arithmetic number, because the mean of its divisors is an integer number (3113964).

Almost surely, 2^12225139 is an apocalyptic number.

12225139 is a deficient number, since it is larger than the sum of its proper divisors (230717).

12225139 is an equidigital number, since it uses as much as digits as its factorization.

12225139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230716.

The product of its digits is 1080, while the sum is 25.

The square root of 12225139 is about 3496.4466247892. The cubic root of 12225139 is about 230.3657633329.

The spelling of 12225139 in words is "twelve million, two hundred twenty-five thousand, one hundred thirty-nine".