1020028291 has 4 divisors (see below), whose sum is σ = 1020099184. Its totient is φ = 1019957400.

The previous prime is 1020028279. The next prime is 1020028297. The reversal of 1020028291 is 1928200201.

1020028291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1020028291 - 2⁹ = 1020027779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020028297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5340 + ... + 45481.

It is an arithmetic number, because the mean of its divisors is an integer number (255024796).

Almost surely, 2^1020028291 is an apocalyptic number.

1020028291 is a deficient number, since it is larger than the sum of its proper divisors (70893).

1020028291 is an equidigital number, since it uses as much as digits as its factorization.

1020028291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70892.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1020028291 is about 31937.8817550570. The cubic root of 1020028291 is about 1006.6320161287.

Adding to 1020028291 its reverse (1928200201), we get a palindrome (2948228492).

The spelling of 1020028291 in words is "one billion, twenty million, twenty-eight thousand, two hundred ninety-one".