10004921 has 2 divisors, whose sum is σ = 10004922. Its totient is φ = 10004920.

The previous prime is 10004881. The next prime is 10004923. The reversal of 10004921 is 12940001.

It is a happy number.

10004921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9985600 + 19321 = 3160^2 + 139^2 .

It is an emirp because it is prime and its reverse (12940001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10004921 - 2¹⁰ = 10003897 is a prime.

Together with 10004923, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10004921.

It is not a weakly prime, because it can be changed into another prime (10004923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002460 + 5002461.

It is an arithmetic number, because the mean of its divisors is an integer number (5002461).

Almost surely, 2^10004921 is an apocalyptic number.

It is an amenable number.

10004921 is a deficient number, since it is larger than the sum of its proper divisors (1).

10004921 is an equidigital number, since it uses as much as digits as its factorization.

10004921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 10004921 is about 3163.0556428871. The cubic root of 10004921 is about 215.4788031182.

Adding to 10004921 its reverse (12940001), we get a palindrome (22944922).

The spelling of 10004921 in words is "ten million, four thousand, nine hundred twenty-one".