1145421143 has 4 divisors (see below), whose sum is σ = 1172058888. Its totient is φ = 1118783400.

The previous prime is 1145421127. The next prime is 1145421157. The reversal of 1145421143 is 3411245411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3411245411 = 7 ⋅487320773.

It is a cyclic number.

It is not a de Polignac number, because 1145421143 - 2⁴ = 1145421127 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 (1145421113) 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, 13318808 + ... + 13318893.

It is an arithmetic number, because the mean of its divisors is an integer number (293014722).

Almost surely, 2^1145421143 is an apocalyptic number.

1145421143 is a deficient number, since it is larger than the sum of its proper divisors (26637745).

1145421143 is an equidigital number, since it uses as much as digits as its factorization.

1145421143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26637744.

The product of its digits is 1920, while the sum is 26.

The square root of 1145421143 is about 33844.0710169448. The cubic root of 1145421143 is about 1046.2972048643.

Adding to 1145421143 its reverse (3411245411), we get a palindrome (4556666554).

The spelling of 1145421143 in words is "one billion, one hundred forty-five million, four hundred twenty-one thousand, one hundred forty-three".