1728425 has 12 divisors (see below), whose sum is σ = 2190336. Its totient is φ = 1352400.

The previous prime is 1728409. The next prime is 1728439. The reversal of 1728425 is 5248271.

It is not a de Polignac number, because 1728425 - 2⁴ = 1728409 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 440 + ... + 1910.

It is an arithmetic number, because the mean of its divisors is an integer number (182528).

2^1728425 is an apocalyptic number.

It is an amenable number.

1728425 is a deficient number, since it is larger than the sum of its proper divisors (461911).

1728425 is a wasteful number, since it uses less digits than its factorization.

1728425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528 (or 1523 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 1728425 is about 1314.6957823010. The cubic root of 1728425 is about 120.0098371565.

The spelling of 1728425 in words is "one million, seven hundred twenty-eight thousand, four hundred twenty-five".