1020323521 has 12 divisors (see below), whose sum is σ = 1207027440. Its totient is φ = 859737480.

The previous prime is 1020323471. The next prime is 1020323573. The reversal of 1020323521 is 1253230201.

1020323521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1020323521 - 2¹¹ = 1020321473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020323621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173575 + ... + 179356.

It is an arithmetic number, because the mean of its divisors is an integer number (100585620).

Almost surely, 2^1020323521 is an apocalyptic number.

It is an amenable number.

1020323521 is a deficient number, since it is larger than the sum of its proper divisors (186703919).

1020323521 is an equidigital number, since it uses as much as digits as its factorization.

1020323521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353004 (or 352997 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1020323521 is about 31942.5033615088. The cubic root of 1020323521 is about 1006.7291243185.

Adding to 1020323521 its reverse (1253230201), we get a palindrome (2273553722).

The spelling of 1020323521 in words is "one billion, twenty million, three hundred twenty-three thousand, five hundred twenty-one".