10421165 has 4 divisors (see below), whose sum is σ = 12505404. Its totient is φ = 8336928.

The previous prime is 10421143. The next prime is 10421207. The reversal of 10421165 is 56112401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56112401 = 1151 ⋅48751.

It can be written as a sum of positive squares in 2 ways, for example, as 2253001 + 8168164 = 1501^2 + 2858^2 .

It is a cyclic number.

It is not a de Polignac number, because 10421165 - 2¹⁶ = 10355629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1042112 + ... + 1042121.

It is an arithmetic number, because the mean of its divisors is an integer number (3126351).

Almost surely, 2^10421165 is an apocalyptic number.

It is an amenable number.

10421165 is a deficient number, since it is larger than the sum of its proper divisors (2084239).

10421165 is an equidigital number, since it uses as much as digits as its factorization.

10421165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084238.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 10421165 is about 3228.1829254241. The cubic root of 10421165 is about 218.4265489089.

Adding to 10421165 its reverse (56112401), we get a palindrome (66533566).

The spelling of 10421165 in words is "ten million, four hundred twenty-one thousand, one hundred sixty-five".