1143424421 has 4 divisors (see below), whose sum is σ = 1143522144. Its totient is φ = 1143326700.

The previous prime is 1143424417. The next prime is 1143424439. The reversal of 1143424421 is 1244243411.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1244243411 = 1553 ⋅801187.

It is a cyclic number.

It is not a de Polignac number, because 1143424421 - 2² = 1143424417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143424411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28475 + ... + 55656.

It is an arithmetic number, because the mean of its divisors is an integer number (285880536).

Almost surely, 2^1143424421 is an apocalyptic number.

It is an amenable number.

1143424421 is a deficient number, since it is larger than the sum of its proper divisors (97723).

1143424421 is an equidigital number, since it uses as much as digits as its factorization.

1143424421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97722.

The product of its digits is 3072, while the sum is 26.

The square root of 1143424421 is about 33814.5593051277. The cubic root of 1143424421 is about 1045.6888755478.

Adding to 1143424421 its reverse (1244243411), we get a palindrome (2387667832).

The spelling of 1143424421 in words is "one billion, one hundred forty-three million, four hundred twenty-four thousand, four hundred twenty-one".