134409 has 8 divisors (see below), whose sum is σ = 195552. Its totient is φ = 81440.

The previous prime is 134401. The next prime is 134417. The reversal of 134409 is 904431.

It is an interprime number because it is at equal distance from previous prime (134401) and next prime (134417).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 134409 - 2³ = 134401 is a prime.

It is a Curzon number.

134409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (134401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2004 + ... + 2069.

It is an arithmetic number, because the mean of its divisors is an integer number (24444).

2¹³⁴⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

134409 is a deficient number, since it is larger than the sum of its proper divisors (61143).

134409 is a wasteful number, since it uses less digits than its factorization.

134409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4087.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 134409 is about 366.6183301473. The cubic root of 134409 is about 51.2243099482.

The spelling of 134409 in words is "one hundred thirty-four thousand, four hundred nine".