1142543321 has 4 divisors (see below), whose sum is σ = 1202677200. Its totient is φ = 1082409444.

The previous prime is 1142543291. The next prime is 1142543329. The reversal of 1142543321 is 1233452411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1233452411 = 53 ⋅23272687.

It is a cyclic number.

It is not a de Polignac number, because 1142543321 - 2¹⁴ = 1142526937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1142543329) 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, 30066911 + ... + 30066948.

It is an arithmetic number, because the mean of its divisors is an integer number (300669300).

Almost surely, 2^1142543321 is an apocalyptic number.

It is an amenable number.

1142543321 is a deficient number, since it is larger than the sum of its proper divisors (60133879).

1142543321 is an equidigital number, since it uses as much as digits as its factorization.

1142543321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60133878.

The product of its digits is 2880, while the sum is 26.

The square root of 1142543321 is about 33801.5283826042. The cubic root of 1142543321 is about 1045.4202108793.

Adding to 1142543321 its reverse (1233452411), we get a palindrome (2375995732).

The spelling of 1142543321 in words is "one billion, one hundred forty-two million, five hundred forty-three thousand, three hundred twenty-one".