10065821 has 2 divisors, whose sum is σ = 10065822. Its totient is φ = 10065820.

The previous prime is 10065817. The next prime is 10065841. The reversal of 10065821 is 12856001.

10065821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8940100 + 1125721 = 2990^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 10065821 - 2² = 10065817 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10065841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5032910 + 5032911.

It is an arithmetic number, because the mean of its divisors is an integer number (5032911).

Almost surely, 2^10065821 is an apocalyptic number.

It is an amenable number.

10065821 is a deficient number, since it is larger than the sum of its proper divisors (1).

10065821 is an equidigital number, since it uses as much as digits as its factorization.

10065821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 10065821 is about 3172.6678048608. The cubic root of 10065821 is about 215.9151258335.

The spelling of 10065821 in words is "ten million, sixty-five thousand, eight hundred twenty-one".