1042643243 has 8 divisors (see below), whose sum is σ = 1102528896. Its totient is φ = 984398400.

The previous prime is 1042643233. The next prime is 1042643257. The reversal of 1042643243 is 3423462401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1042643243 - 2⁴ = 1042643227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042643233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408896 + ... + 411437.

It is an arithmetic number, because the mean of its divisors is an integer number (137816112).

Almost surely, 2^1042643243 is an apocalyptic number.

1042643243 is a deficient number, since it is larger than the sum of its proper divisors (59885653).

1042643243 is an equidigital number, since it uses as much as digits as its factorization.

1042643243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820405.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 1042643243 is about 32289.9867296349. The cubic root of 1042643243 is about 1014.0170194914.

The spelling of 1042643243 in words is "one billion, forty-two million, six hundred forty-three thousand, two hundred forty-three".