12142142 has 32 divisors (see below), whose sum is σ = 19845120. Its totient is φ = 5559840.

The previous prime is 12142139. The next prime is 12142147. The reversal of 12142142 is 24124121.

It is a super-2 number, since 2×12142142² = 294863224696328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12142142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12142147) 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 15 ways as a sum of consecutive naturals, for example, 153659 + ... + 153737.

It is an arithmetic number, because the mean of its divisors is an integer number (620160).

Almost surely, 2^12142142 is an apocalyptic number.

12142142 is a deficient number, since it is larger than the sum of its proper divisors (7702978).

12142142 is a wasteful number, since it uses less digits than its factorization.

12142142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216.

The product of its digits is 128, while the sum is 17.

The square root of 12142142 is about 3484.5576476793. The cubic root of 12142142 is about 229.8432580460.

Adding to 12142142 its reverse (24124121), we get a palindrome (36266263).

The spelling of 12142142 in words is "twelve million, one hundred forty-two thousand, one hundred forty-two".