1142542243 has 4 divisors (see below), whose sum is σ = 1142963640. Its totient is φ = 1142120848.

The previous prime is 1142542241. The next prime is 1142542259. The reversal of 1142542243 is 3422452411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3422452411 = 7 ⋅488921773.

It is a cyclic number.

It is not a de Polignac number, because 1142542243 - 2¹ = 1142542241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142542241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206605 + ... + 212062.

It is an arithmetic number, because the mean of its divisors is an integer number (285740910).

Almost surely, 2^1142542243 is an apocalyptic number.

1142542243 is a deficient number, since it is larger than the sum of its proper divisors (421397).

1142542243 is an equidigital number, since it uses as much as digits as its factorization.

1142542243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421396.

The product of its digits is 7680, while the sum is 28.

The square root of 1142542243 is about 33801.5124365760. The cubic root of 1142542243 is about 1045.4198820914.

Adding to 1142542243 its reverse (3422452411), we get a palindrome (4564994654).

The spelling of 1142542243 in words is "one billion, one hundred forty-two million, five hundred forty-two thousand, two hundred forty-three".