1605601172 has 12 divisors (see below), whose sum is σ = 3211202400. Its totient is φ = 688114776.

The previous prime is 1605601157. The next prime is 1605601223. The reversal of 1605601172 is 2711065061.

1605601172 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28671422 + ... + 28671477.

It is an arithmetic number, because the mean of its divisors is an integer number (267600200).

Almost surely, 2^1605601172 is an apocalyptic number.

It is an amenable number.

1605601172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1605601172 is a wasteful number, since it uses less digits than its factorization.

1605601172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57342910 (or 57342908 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1605601172 is about 40069.9534813805. The cubic root of 1605601172 is about 1170.9703329340.

The spelling of 1605601172 in words is "one billion, six hundred five million, six hundred one thousand, one hundred seventy-two".