134138405 has 8 divisors (see below), whose sum is σ = 161954592. Its totient is φ = 106651728.

The previous prime is 134138401. The next prime is 134138413. The reversal of 134138405 is 504831431.

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 134138405 - 2² = 134138401 is a prime.

It is a super-2 number, since 2×134138405² = 35986223391888050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134138401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81479 + ... + 83108.

It is an arithmetic number, because the mean of its divisors is an integer number (20244324).

Almost surely, 2^134138405 is an apocalyptic number.

It is an amenable number.

134138405 is a deficient number, since it is larger than the sum of its proper divisors (27816187).

134138405 is a wasteful number, since it uses less digits than its factorization.

134138405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164755.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 134138405 is about 11581.8135453823. The cubic root of 134138405 is about 511.8991157127.

Adding to 134138405 its reverse (504831431), we get a palindrome (638969836).

The spelling of 134138405 in words is "one hundred thirty-four million, one hundred thirty-eight thousand, four hundred five".