14128021 has 2 divisors, whose sum is σ = 14128022. Its totient is φ = 14128020.

The previous prime is 14128019. The next prime is 14128057. The reversal of 14128021 is 12082141.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9696996 + 4431025 = 3114^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 14128021 - 2¹ = 14128019 is a prime.

Together with 14128019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 14128021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14128321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7064010 + 7064011.

It is an arithmetic number, because the mean of its divisors is an integer number (7064011).

Almost surely, 2^14128021 is an apocalyptic number.

It is an amenable number.

14128021 is a deficient number, since it is larger than the sum of its proper divisors (1).

14128021 is an equidigital number, since it uses as much as digits as its factorization.

14128021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 14128021 is about 3758.7259809675. The cubic root of 14128021 is about 241.7466385085.

The spelling of 14128021 in words is "fourteen million, one hundred twenty-eight thousand, twenty-one".