1142142243 has 16 divisors (see below), whose sum is σ = 1663798656. Its totient is φ = 691165440.

The previous prime is 1142142241. The next prime is 1142142247. The reversal of 1142142243 is 3422412411.

It is not a de Polignac number, because 1142142243 - 2¹ = 1142142241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1142142241) 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 15 ways as a sum of consecutive naturals, for example, 3505 + ... + 47922.

It is an arithmetic number, because the mean of its divisors is an integer number (103987416).

Almost surely, 2^1142142243 is an apocalyptic number.

1142142243 is a deficient number, since it is larger than the sum of its proper divisors (521656413).

1142142243 is a wasteful number, since it uses less digits than its factorization.

1142142243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52114.

The product of its digits is 1536, while the sum is 24.

The square root of 1142142243 is about 33795.5950236122. The cubic root of 1142142243 is about 1045.2978685831.

Adding to 1142142243 its reverse (3422412411), we get a palindrome (4564554654).

The spelling of 1142142243 in words is "one billion, one hundred forty-two million, one hundred forty-two thousand, two hundred forty-three".