1142789144 has 32 divisors (see below), whose sum is σ = 2473092000. Its totient is φ = 484915200.

The previous prime is 1142789129. The next prime is 1142789149. The reversal of 1142789144 is 4419872411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142789149) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 95369 + ... + 106680.

It is an arithmetic number, because the mean of its divisors is an integer number (77284125).

Almost surely, 2^1142789144 is an apocalyptic number.

1142789144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1142789144 is an abundant number, since it is smaller than the sum of its proper divisors (1330302856).

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

1142789144 is a wasteful number, since it uses less digits than its factorization.

1142789144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202163 (or 202159 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 1142789144 is about 33805.1644575204. The cubic root of 1142789144 is about 1045.4951810210.

The spelling of 1142789144 in words is "one billion, one hundred forty-two million, seven hundred eighty-nine thousand, one hundred forty-four".