1428432143 has 4 divisors (see below), whose sum is σ = 1428701160. Its totient is φ = 1428163128.

The previous prime is 1428432121. The next prime is 1428432199. The reversal of 1428432143 is 3412348241.

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 1428432143 - 2¹⁸ = 1428169999 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 (1428432113) 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, 126380 + ... + 137217.

It is an arithmetic number, because the mean of its divisors is an integer number (357175290).

Almost surely, 2^1428432143 is an apocalyptic number.

1428432143 is a deficient number, since it is larger than the sum of its proper divisors (269017).

1428432143 is an equidigital number, since it uses as much as digits as its factorization.

1428432143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269016.

The product of its digits is 18432, while the sum is 32.

The square root of 1428432143 is about 37794.6046810917. The cubic root of 1428432143 is about 1126.2112762354.

The spelling of 1428432143 in words is "one billion, four hundred twenty-eight million, four hundred thirty-two thousand, one hundred forty-three".