10003021 has 8 divisors (see below), whose sum is σ = 12104640. Its totient is φ = 8069568.

The previous prime is 10003003. The next prime is 10003027. The reversal of 10003021 is 12030001.

10003021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10003021 - 2¹⁷ = 9871949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10002995 and 10003013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10003027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41911 + ... + 42148.

It is an arithmetic number, because the mean of its divisors is an integer number (1513080).

Almost surely, 2^10003021 is an apocalyptic number.

It is an amenable number.

10003021 is a deficient number, since it is larger than the sum of its proper divisors (2101619).

10003021 is an equidigital number, since it uses as much as digits as its factorization.

10003021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84083.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 10003021 is about 3162.7552861390. The cubic root of 10003021 is about 215.4651619762.

Adding to 10003021 its reverse (12030001), we get a palindrome (22033022).

The spelling of 10003021 in words is "ten million, three thousand, twenty-one".