10299821 has 4 divisors (see below), whose sum is σ = 11771232. Its totient is φ = 8828412.

The previous prime is 10299811. The next prime is 10299851. The reversal of 10299821 is 12899201.

It is a happy number.

10299821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10299821 - 2¹⁰ = 10298797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10299811) 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 in 3 ways as a sum of consecutive naturals, for example, 735695 + ... + 735708.

It is an arithmetic number, because the mean of its divisors is an integer number (2942808).

Almost surely, 2^10299821 is an apocalyptic number.

It is an amenable number.

10299821 is a deficient number, since it is larger than the sum of its proper divisors (1471411).

10299821 is an equidigital number, since it uses as much as digits as its factorization.

10299821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471410.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 10299821 is about 3209.3334198864. Note that the first 3 decimals coincide. The cubic root of 10299821 is about 217.5754509886.

The spelling of 10299821 in words is "ten million, two hundred ninety-nine thousand, eight hundred twenty-one".