1142545243 has 16 divisors (see below), whose sum is σ = 1323656640. Its totient is φ = 965961216.

The previous prime is 1142545211. The next prime is 1142545247. The reversal of 1142545243 is 3425452411.

It is a cyclic number.

It is not a de Polignac number, because 1142545243 - 2⁵ = 1142545211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142545247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282705 + ... + 286717.

It is an arithmetic number, because the mean of its divisors is an integer number (82728540).

Almost surely, 2^1142545243 is an apocalyptic number.

1142545243 is a deficient number, since it is larger than the sum of its proper divisors (181111397).

1142545243 is an equidigital number, since it uses as much as digits as its factorization.

1142545243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4566.

The product of its digits is 19200, while the sum is 31.

The square root of 1142545243 is about 33801.5568132594. The cubic root of 1142545243 is about 1045.4207970851.

Adding to 1142545243 its reverse (3425452411), we get a palindrome (4567997654).

The spelling of 1142545243 in words is "one billion, one hundred forty-two million, five hundred forty-five thousand, two hundred forty-three".