1728203 has 8 divisors (see below), whose sum is σ = 1841472. Its totient is φ = 1616256.

The previous prime is 1728193. The next prime is 1728229. The reversal of 1728203 is 3028271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1728203 - 2¹⁰ = 1727179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1728253) 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, 4526 + ... + 4892.

It is an arithmetic number, because the mean of its divisors is an integer number (230184).

2^1728203 is an apocalyptic number.

1728203 is a deficient number, since it is larger than the sum of its proper divisors (113269).

1728203 is a wasteful number, since it uses less digits than its factorization.

1728203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1728203 is about 1314.6113494109. The cubic root of 1728203 is about 120.0046988901.

The spelling of 1728203 in words is "one million, seven hundred twenty-eight thousand, two hundred three".