14279821 has 2 divisors, whose sum is σ = 14279822. Its totient is φ = 14279820.

The previous prime is 14279819. The next prime is 14279851. The reversal of 14279821 is 12897241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10989225 + 3290596 = 3315^2 + 1814^2 .

It is a cyclic number.

It is not a de Polignac number, because 14279821 - 2¹ = 14279819 is a prime.

Together with 14279819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14279851) 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 as a sum of consecutive naturals, namely, 7139910 + 7139911.

It is an arithmetic number, because the mean of its divisors is an integer number (7139911).

Almost surely, 2^14279821 is an apocalyptic number.

It is an amenable number.

14279821 is a deficient number, since it is larger than the sum of its proper divisors (1).

14279821 is an equidigital number, since it uses as much as digits as its factorization.

14279821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 14279821 is about 3778.8650412525. The cubic root of 14279821 is about 242.6093799265.

The spelling of 14279821 in words is "fourteen million, two hundred seventy-nine thousand, eight hundred twenty-one".