1728106 has 4 divisors (see below), whose sum is σ = 2592162. Its totient is φ = 864052.

The previous prime is 1728091. The next prime is 1728119. The reversal of 1728106 is 6018271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1357225 + 370881 = 1165^2 + 609^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432025 + ... + 432028.

2^1728106 is an apocalyptic number.

1728106 is a deficient number, since it is larger than the sum of its proper divisors (864056).

1728106 is an equidigital number, since it uses as much as digits as its factorization.

1728106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864055.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1728106 is about 1314.5744558601. The cubic root of 1728106 is about 120.0024536535.

The spelling of 1728106 in words is "one million, seven hundred twenty-eight thousand, one hundred six".