134405565 has 32 divisors (see below), whose sum is σ = 246896640. Its totient is φ = 61161024.

The previous prime is 134405561. The next prime is 134405567. The reversal of 134405565 is 565504431.

134405565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 134405565 - 2² = 134405561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134405561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21016 + ... + 26654.

It is an arithmetic number, because the mean of its divisors is an integer number (7715520).

Almost surely, 2^134405565 is an apocalyptic number.

134405565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

134405565 is a deficient number, since it is larger than the sum of its proper divisors (112491075).

134405565 is a wasteful number, since it uses less digits than its factorization.

134405565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5881.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 134405565 is about 11593.3414078944. The cubic root of 134405565 is about 512.2387357616.

Adding to 134405565 its reverse (565504431), we get a palindrome (699909996).

The spelling of 134405565 in words is "one hundred thirty-four million, four hundred five thousand, five hundred sixty-five".