1142243120 has 40 divisors (see below), whose sum is σ = 2658874464. Its totient is φ = 456353792.

The previous prime is 1142243119. The next prime is 1142243129. The reversal of 1142243120 is 213422411.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1142243092 and 1142243101.

It is not an unprimeable number, because it can be changed into a prime (1142243129) 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 7 ways as a sum of consecutive naturals, for example, 62912 + ... + 79008.

Almost surely, 2^1142243120 is an apocalyptic number.

1142243120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142243120 is an abundant number, since it is smaller than the sum of its proper divisors (1516631344).

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

1142243120 is a wasteful number, since it uses less digits than its factorization.

1142243120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16997 (or 16991 counting only the distinct ones).

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

The square root of 1142243120 is about 33797.0874484770. The cubic root of 1142243120 is about 1045.3286421607.

Adding to 1142243120 its reverse (213422411), we get a palindrome (1355665531).

The spelling of 1142243120 in words is "one billion, one hundred forty-two million, two hundred forty-three thousand, one hundred twenty".