14021509 has 2 divisors, whose sum is σ = 14021510. Its totient is φ = 14021508.

The previous prime is 14021507. The next prime is 14021519. The reversal of 14021509 is 90512041.

14021509 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11390625 + 2630884 = 3375^2 + 1622^2 .

It is an emirp because it is prime and its reverse (90512041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14021509 - 2¹ = 14021507 is a prime.

Together with 14021507, 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 14021509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14021503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7010754 + 7010755.

It is an arithmetic number, because the mean of its divisors is an integer number (7010755).

Almost surely, 2^14021509 is an apocalyptic number.

It is an amenable number.

14021509 is a deficient number, since it is larger than the sum of its proper divisors (1).

14021509 is an equidigital number, since it uses as much as digits as its factorization.

14021509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 14021509 is about 3744.5305446745. The cubic root of 14021509 is about 241.1375912377.

The spelling of 14021509 in words is "fourteen million, twenty-one thousand, five hundred nine".