10643321 has 4 divisors (see below), whose sum is σ = 11462052. Its totient is φ = 9824592.

The previous prime is 10643267. The next prime is 10643329. The reversal of 10643321 is 12334601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12334601 = 23 ⋅536287.

It can be written as a sum of positive squares in 2 ways, for example, as 3857296 + 6786025 = 1964^2 + 2605^2 .

It is a cyclic number.

It is not a de Polignac number, because 10643321 - 2⁶ = 10643257 is a prime.

It is a super-2 number, since 2×10643321² = 226560563818082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10643293 and 10643302.

It is not an unprimeable number, because it can be changed into a prime (10643329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409346 + ... + 409371.

It is an arithmetic number, because the mean of its divisors is an integer number (2865513).

Almost surely, 2^10643321 is an apocalyptic number.

It is an amenable number.

10643321 is a deficient number, since it is larger than the sum of its proper divisors (818731).

10643321 is an equidigital number, since it uses as much as digits as its factorization.

10643321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818730.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 10643321 is about 3262.4103052804. The cubic root of 10643321 is about 219.9677707609.

Adding to 10643321 its reverse (12334601), we get a palindrome (22977922).

The spelling of 10643321 in words is "ten million, six hundred forty-three thousand, three hundred twenty-one".