10023021 has 16 divisors (see below), whose sum is σ = 15035520. Its totient is φ = 6680556.

The previous prime is 10023007. The next prime is 10023023. The reversal of 10023021 is 12032001.

It is a happy number.

10023021 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-10023021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10022994 and 10023012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10023023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105 + ... + 4478.

It is an arithmetic number, because the mean of its divisors is an integer number (939720).

Almost surely, 2^10023021 is an apocalyptic number.

It is an amenable number.

10023021 is a deficient number, since it is larger than the sum of its proper divisors (5012499).

10023021 is an frugal number, since it uses more digits than its factorization.

10023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4604 (or 4586 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 10023021 is about 3165.9155074007. The cubic root of 10023021 is about 215.6086664376.

Adding to 10023021 its reverse (12032001), we get a palindrome (22055022).

The spelling of 10023021 in words is "ten million, twenty-three thousand, twenty-one".