14168821 has 4 divisors (see below), whose sum is σ = 14514444. Its totient is φ = 13823200.

The previous prime is 14168809. The next prime is 14168867. The reversal of 14168821 is 12886141.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3186225 + 10982596 = 1785^2 + 3314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14168821 is a prime.

It is a Smith number, since the sum of its digits (31) 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14168881) 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, 172750 + ... + 172831.

It is an arithmetic number, because the mean of its divisors is an integer number (3628611).

Almost surely, 2^14168821 is an apocalyptic number.

It is an amenable number.

14168821 is a deficient number, since it is larger than the sum of its proper divisors (345623).

14168821 is an equidigital number, since it uses as much as digits as its factorization.

14168821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345622.

The product of its digits is 3072, while the sum is 31.

The square root of 14168821 is about 3764.1494391164. The cubic root of 14168821 is about 241.9791264468.

The spelling of 14168821 in words is "fourteen million, one hundred sixty-eight thousand, eight hundred twenty-one".