1121430143 has 4 divisors (see below), whose sum is σ = 1187396640. Its totient is φ = 1055463648.

The previous prime is 1121430139. The next prime is 1121430187. The reversal of 1121430143 is 3410341211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1121430143 - 2² = 1121430139 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 (1121430133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32983223 + ... + 32983256.

It is an arithmetic number, because the mean of its divisors is an integer number (296849160).

Almost surely, 2^1121430143 is an apocalyptic number.

1121430143 is a deficient number, since it is larger than the sum of its proper divisors (65966497).

1121430143 is an equidigital number, since it uses as much as digits as its factorization.

1121430143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65966496.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1121430143 is about 33487.7610926738. The cubic root of 1121430143 is about 1038.9406567120.

Adding to 1121430143 its reverse (3410341211), we get a palindrome (4531771354).

The spelling of 1121430143 in words is "one billion, one hundred twenty-one million, four hundred thirty thousand, one hundred forty-three".