1143400043 has 6 divisors (see below), whose sum is σ = 1162455372. Its totient is φ = 1124652120.

The previous prime is 1143400021. The next prime is 1143400051. The reversal of 1143400043 is 3400043411.

It is a happy number.

It is not a de Polignac number, because 1143400043 - 2⁶ = 1143399979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143399988 and 1143400024.

It is not an unprimeable number, because it can be changed into a prime (1143400003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 149921 + ... + 157362.

It is an arithmetic number, because the mean of its divisors is an integer number (193742562).

Almost surely, 2^1143400043 is an apocalyptic number.

1143400043 is a deficient number, since it is larger than the sum of its proper divisors (19055329).

1143400043 is an frugal number, since it uses more digits than its factorization.

1143400043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307405 (or 307344 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1143400043 is about 33814.1988371749. The cubic root of 1143400043 is about 1045.6814440744.

Adding to 1143400043 its reverse (3400043411), we get a palindrome (4543443454).

The spelling of 1143400043 in words is "one billion, one hundred forty-three million, four hundred thousand, forty-three".