1142305543 has 4 divisors (see below), whose sum is σ = 1145288448. Its totient is φ = 1139322640.

The previous prime is 1142305499. The next prime is 1142305547. The reversal of 1142305543 is 3455032411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3455032411 = 1129 ⋅3060259.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142305543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142305547) 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, 1490878 + ... + 1491643.

It is an arithmetic number, because the mean of its divisors is an integer number (286322112).

Almost surely, 2^1142305543 is an apocalyptic number.

1142305543 is a deficient number, since it is larger than the sum of its proper divisors (2982905).

1142305543 is an equidigital number, since it uses as much as digits as its factorization.

1142305543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982904.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1142305543 is about 33798.0109325978. The cubic root of 1142305543 is about 1045.3476840384.

Adding to 1142305543 its reverse (3455032411), we get a palindrome (4597337954).

The spelling of 1142305543 in words is "one billion, one hundred forty-two million, three hundred five thousand, five hundred forty-three".