201605406 has 16 divisors (see below), whose sum is σ = 405627264. Its totient is φ = 66799064.

The previous prime is 201605401. The next prime is 201605407. The reversal of 201605406 is 604506102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201605401) 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, 99600 + ... + 101603.

It is an arithmetic number, because the mean of its divisors is an integer number (25351704).

Almost surely, 2^201605406 is an apocalyptic number.

201605406 is an abundant number, since it is smaller than the sum of its proper divisors (204021858).

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

201605406 is a wasteful number, since it uses less digits than its factorization.

201605406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201375.

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

The square root of 201605406 is about 14198.7818491588. The cubic root of 201605406 is about 586.3641246687.

The spelling of 201605406 in words is "two hundred one million, six hundred five thousand, four hundred six".