134405 has 4 divisors (see below), whose sum is σ = 161292. Its totient is φ = 107520.

The previous prime is 134401. The next prime is 134417. The reversal of 134405 is 504431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77284 + 57121 = 278^2 + 239^2 .

It is not a de Polignac number, because 134405 - 2² = 134401 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 13436 + ... + 13445.

It is an arithmetic number, because the mean of its divisors is an integer number (40323).

2¹³⁴⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

134405 is a deficient number, since it is larger than the sum of its proper divisors (26887).

134405 is an equidigital number, since it uses as much as digits as its factorization.

134405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26886.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 134405 is about 366.6128748421. The cubic root of 134405 is about 51.2238017995.

Adding to 134405 its reverse (504431), we get a palindrome (638836).

The spelling of 134405 in words is "one hundred thirty-four thousand, four hundred five".