12142226 has 4 divisors (see below), whose sum is σ = 18213342. Its totient is φ = 6071112.

The previous prime is 12142219. The next prime is 12142231. The reversal of 12142226 is 62224121.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 9579025 + 2563201 = 3095^2 + 1601^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12142198 and 12142207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3035555 + ... + 3035558.

Almost surely, 2^12142226 is an apocalyptic number.

12142226 is a deficient number, since it is larger than the sum of its proper divisors (6071116).

12142226 is an equidigital number, since it uses as much as digits as its factorization.

12142226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6071115.

The product of its digits is 384, while the sum is 20.

The square root of 12142226 is about 3484.5697008383. The cubic root of 12142226 is about 229.8437880675.

Adding to 12142226 its reverse (62224121), we get a palindrome (74366347).

The spelling of 12142226 in words is "twelve million, one hundred forty-two thousand, two hundred twenty-six".