2005172 has 12 divisors (see below), whose sum is σ = 3779076. Its totient is φ = 925440.

The previous prime is 2005151. The next prime is 2005181. The reversal of 2005172 is 2715002.

It can be written as a sum of positive squares in 2 ways, for example, as 376996 + 1628176 = 614^2 + 1276^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2005172.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19229 + ... + 19332.

It is an arithmetic number, because the mean of its divisors is an integer number (314923).

2^2005172 is an apocalyptic number.

It is an amenable number.

2005172 is a deficient number, since it is larger than the sum of its proper divisors (1773904).

2005172 is a wasteful number, since it uses less digits than its factorization.

2005172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38578 (or 38576 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 2005172 is about 1416.0409598596. The cubic root of 2005172 is about 126.1006167006.

The spelling of 2005172 in words is "two million, five thousand, one hundred seventy-two".