10285921 has 2 divisors, whose sum is σ = 10285922. Its totient is φ = 10285920.

The previous prime is 10285871. The next prime is 10285937. The reversal of 10285921 is 12958201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8785296 + 1500625 = 2964^2 + 1225^2 .

It is an emirp because it is prime and its reverse (12958201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10285921 - 2⁹ = 10285409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10285921.

It is not a weakly prime, because it can be changed into another prime (10288921) 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 as a sum of consecutive naturals, namely, 5142960 + 5142961.

It is an arithmetic number, because the mean of its divisors is an integer number (5142961).

Almost surely, 2^10285921 is an apocalyptic number.

It is an amenable number.

10285921 is a deficient number, since it is larger than the sum of its proper divisors (1).

10285921 is an equidigital number, since it uses as much as digits as its factorization.

10285921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 10285921 is about 3207.1671300386. The cubic root of 10285921 is about 217.4775314792.

The spelling of 10285921 in words is "ten million, two hundred eighty-five thousand, nine hundred twenty-one".