1728045 has 24 divisors (see below), whose sum is σ = 3268512. Its totient is φ = 837600.

The previous prime is 1728043. The next prime is 1728061. The reversal of 1728045 is 5408271.

It is not a de Polignac number, because 1728045 - 2¹ = 1728043 is a prime.

It is a super-2 number, since 2×1728045² = 5972279044050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1251 + ... + 2240.

It is an arithmetic number, because the mean of its divisors is an integer number (136188).

2^1728045 is an apocalyptic number.

1728045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1728045 is a deficient number, since it is larger than the sum of its proper divisors (1540467).

1728045 is a wasteful number, since it uses less digits than its factorization.

1728045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513 (or 3510 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1728045 is about 1314.5512542309. The cubic root of 1728045 is about 120.0010416576.

The spelling of 1728045 in words is "one million, seven hundred twenty-eight thousand, forty-five".