1142178729 has 8 divisors (see below), whose sum is σ = 1526239200. Its totient is φ = 759785376.

The previous prime is 1142178703. The next prime is 1142178731. The reversal of 1142178729 is 9278712411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1142178729 - 2¹⁹ = 1141654441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1142178529) 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, 415179 + ... + 417920.

It is an arithmetic number, because the mean of its divisors is an integer number (190779900).

Almost surely, 2^1142178729 is an apocalyptic number.

It is an amenable number.

1142178729 is a deficient number, since it is larger than the sum of its proper divisors (384060471).

1142178729 is an equidigital number, since it uses as much as digits as its factorization.

1142178729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833559.

The product of its digits is 56448, while the sum is 42.

The square root of 1142178729 is about 33796.1348233788. The cubic root of 1142178729 is about 1045.3089992259.

The spelling of 1142178729 in words is "one billion, one hundred forty-two million, one hundred seventy-eight thousand, seven hundred twenty-nine".