1020321043 has 16 divisors (see below), whose sum is σ = 1193771520. Its totient is φ = 853992000.

The previous prime is 1020321037. The next prime is 1020321047. The reversal of 1020321043 is 3401230201.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020321043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020321047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54183 + ... + 70543.

It is an arithmetic number, because the mean of its divisors is an integer number (74610720).

Almost surely, 2^1020321043 is an apocalyptic number.

1020321043 is a deficient number, since it is larger than the sum of its proper divisors (173450477).

1020321043 is a wasteful number, since it uses less digits than its factorization.

1020321043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16578.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1020321043 is about 31942.4645730413. The cubic root of 1020321043 is about 1006.7283093231.

Adding to 1020321043 its reverse (3401230201), we get a palindrome (4421551244).

The spelling of 1020321043 in words is "one billion, twenty million, three hundred twenty-one thousand, forty-three".