10820065 has 4 divisors (see below), whose sum is σ = 12984084. Its totient is φ = 8656048.

The previous prime is 10820057. The next prime is 10820081. The reversal of 10820065 is 56002801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56002801 = 4297 ⋅13033.

It can be written as a sum of positive squares in 2 ways, for example, as 7623121 + 3196944 = 2761^2 + 1788^2 .

It is a cyclic number.

It is not a de Polignac number, because 10820065 - 2³ = 10820057 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082002 + ... + 1082011.

It is an arithmetic number, because the mean of its divisors is an integer number (3246021).

Almost surely, 2^10820065 is an apocalyptic number.

It is an amenable number.

10820065 is a deficient number, since it is larger than the sum of its proper divisors (2164019).

10820065 is an equidigital number, since it uses as much as digits as its factorization.

10820065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164018.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 10820065 is about 3289.3867209557. The cubic root of 10820065 is about 221.1786942911.

Adding to 10820065 its reverse (56002801), we get a palindrome (66822866).

The spelling of 10820065 in words is "ten million, eight hundred twenty thousand, sixty-five".