1142120144 has 80 divisors (see below), whose sum is σ = 2500601856. Its totient is φ = 500774400.

The previous prime is 1142120117. The next prime is 1142120173. The reversal of 1142120144 is 4410212411.

It is a congruent number.

It is an unprimeable number.

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, 826334 + ... + 827714.

Almost surely, 2^1142120144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142120144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1250300928).

1142120144 is an abundant number, since it is smaller than the sum of its proper divisors (1358481712).

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

1142120144 is a wasteful number, since it uses less digits than its factorization.

1142120144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564 (or 1558 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1142120144 is about 33795.2680711368. The cubic root of 1142120144 is about 1045.2911268115.

Adding to 1142120144 its reverse (4410212411), we get a palindrome (5552332555).

The spelling of 1142120144 in words is "one billion, one hundred forty-two million, one hundred twenty thousand, one hundred forty-four".