14509 has 4 divisors (see below), whose sum is σ = 15840. Its totient is φ = 13180.

The previous prime is 14503. The next prime is 14519. The reversal of 14509 is 90541.

14509 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90541 = 11 ⋅8231.

It is a cyclic number.

It is not a de Polignac number, because 14509 - 2⁹ = 13997 is a prime.

It is a super-2 number, since 2×14509² = 421022162, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649 + ... + 670.

It is an arithmetic number, because the mean of its divisors is an integer number (3960).

2¹⁴⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

14509 is a deficient number, since it is larger than the sum of its proper divisors (1331).

14509 is a wasteful number, since it uses less digits than its factorization.

14509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 14509 is about 120.4533104568. The cubic root of 14509 is about 24.3900389332.

The spelling of 14509 in words is "fourteen thousand, five hundred nine".