12142242 has 48 divisors (see below), whose sum is σ = 31112640. Its totient is φ = 3348576.

The previous prime is 12142237. The next prime is 12142261. The reversal of 12142242 is 24224121.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 in 23 ways as a sum of consecutive naturals, for example, 1993 + ... + 5315.

It is an arithmetic number, because the mean of its divisors is an integer number (648180).

Almost surely, 2^12142242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12142242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15556320).

12142242 is an abundant number, since it is smaller than the sum of its proper divisors (18970398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12142242 is a wasteful number, since it uses less digits than its factorization.

12142242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3367 (or 3364 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 12142242 is about 3484.5719966733. The cubic root of 12142242 is about 229.8438890237.

Adding to 12142242 its reverse (24224121), we get a palindrome (36366363).

The spelling of 12142242 in words is "twelve million, one hundred forty-two thousand, two hundred forty-two".