1020323421 has 12 divisors (see below), whose sum is σ = 1587169948. Its totient is φ = 627891264.

The previous prime is 1020323413. The next prime is 1020323453. The reversal of 1020323421 is 1243230201.

It can be written as a sum of positive squares in 2 ways, for example, as 268796025 + 751527396 = 16395^2 + 27414^2 .

It is not a de Polignac number, because 1020323421 - 2³ = 1020323413 is a prime.

It is a super-2 number, since 2×1020323421² = 2082119766882286482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020323394 and 1020323403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020323411) 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 11 ways as a sum of consecutive naturals, for example, 4360240 + ... + 4360473.

Almost surely, 2^1020323421 is an apocalyptic number.

It is an amenable number.

1020323421 is a deficient number, since it is larger than the sum of its proper divisors (566846527).

1020323421 is a wasteful number, since it uses less digits than its factorization.

1020323421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8720732 (or 8720729 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1020323421 is about 31942.5017961962. The cubic root of 1020323421 is about 1006.7290914293.

Adding to 1020323421 its reverse (1243230201), we get a palindrome (2263553622).

The spelling of 1020323421 in words is "one billion, twenty million, three hundred twenty-three thousand, four hundred twenty-one".