134509 has 4 divisors (see below), whose sum is σ = 138880. Its totient is φ = 130140.

The previous prime is 134507. The next prime is 134513. The reversal of 134509 is 905431.

134509 is digitally balanced in base 2, 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: 905431 = 379 ⋅2389.

It is a cyclic number.

It is not a de Polignac number, because 134509 - 2¹ = 134507 is a prime.

134509 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 134509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134503) 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, 2139 + ... + 2200.

It is an arithmetic number, because the mean of its divisors is an integer number (34720).

2¹³⁴⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

134509 is a deficient number, since it is larger than the sum of its proper divisors (4371).

134509 is an equidigital number, since it uses as much as digits as its factorization.

134509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4370.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 134509 is about 366.7546864050. The cubic root of 134509 is about 51.2370103903.

The spelling of 134509 in words is "one hundred thirty-four thousand, five hundred nine".