14421821 has 2 divisors, whose sum is σ = 14421822. Its totient is φ = 14421820.

The previous prime is 14421793. The next prime is 14421857. The reversal of 14421821 is 12812441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13764100 + 657721 = 3710^2 + 811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14421821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14421871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7210910 + 7210911.

It is an arithmetic number, because the mean of its divisors is an integer number (7210911).

Almost surely, 2^14421821 is an apocalyptic number.

It is an amenable number.

14421821 is a deficient number, since it is larger than the sum of its proper divisors (1).

14421821 is an equidigital number, since it uses as much as digits as its factorization.

14421821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 23.

The square root of 14421821 is about 3797.6072730076. The cubic root of 14421821 is about 243.4109064408.

The spelling of 14421821 in words is "fourteen million, four hundred twenty-one thousand, eight hundred twenty-one".