10006021 has 6 divisors (see below), whose sum is σ = 10285170. Its totient is φ = 9734256.

The previous prime is 10006001. The next prime is 10006039. The reversal of 10006021 is 12060001.

It can be written as a sum of positive squares in 3 ways, for example, as 5336100 + 4669921 = 2310^2 + 2161^2 .

It is not a de Polignac number, because 10006021 - 2⁹ = 10005509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10005989 and 10006007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10006001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2286 + ... + 5023.

It is an arithmetic number, because the mean of its divisors is an integer number (1714195).

Almost surely, 2^10006021 is an apocalyptic number.

It is an amenable number.

10006021 is a deficient number, since it is larger than the sum of its proper divisors (279149).

10006021 is an frugal number, since it uses more digits than its factorization.

10006021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7383 (or 7346 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 10006021 is about 3163.2295206007. The cubic root of 10006021 is about 215.4866998322.

Adding to 10006021 its reverse (12060001), we get a palindrome (22066022).

It can be divided in two parts, 1000 and 6021, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 10006021 in words is "ten million, six thousand, twenty-one".