16405134 has 16 divisors (see below), whose sum is σ = 33697488. Its totient is φ = 5320512.

The previous prime is 16405121. The next prime is 16405139. The reversal of 16405134 is 43150461.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16405139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36727 + ... + 37170.

It is an arithmetic number, because the mean of its divisors is an integer number (2106093).

Almost surely, 2^16405134 is an apocalyptic number.

16405134 is an abundant number, since it is smaller than the sum of its proper divisors (17292354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16405134 is a wasteful number, since it uses less digits than its factorization.

16405134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73939.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 16405134 is about 4050.3251721312. The cubic root of 16405134 is about 254.0933275577.

Adding to 16405134 its reverse (43150461), we get a palindrome (59555595).

The spelling of 16405134 in words is "sixteen million, four hundred five thousand, one hundred thirty-four".