12142405145 has 64 divisors (see below), whose sum is σ = 16974693120. Its totient is φ = 8261471232.

The previous prime is 12142405139. The next prime is 12142405189. The reversal of 12142405145 is 54150424121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12142405145 - 2¹⁰ = 12142404121 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19807859 + ... + 19808471.

It is an arithmetic number, because the mean of its divisors is an integer number (265229580).

Almost surely, 2^12142405145 is an apocalyptic number.

It is an amenable number.

12142405145 is a deficient number, since it is larger than the sum of its proper divisors (4832287975).

12142405145 is a wasteful number, since it uses less digits than its factorization.

12142405145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066.

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 12142405145 its reverse (54150424121), we get a palindrome (66292829266).

The spelling of 12142405145 in words is "twelve billion, one hundred forty-two million, four hundred five thousand, one hundred forty-five".