1728043 has 2 divisors, whose sum is σ = 1728044. Its totient is φ = 1728042.

The previous prime is 1728019. The next prime is 1728061. The reversal of 1728043 is 3408271.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1728043 is a prime.

It is a super-2 number, since 2×1728043² = 5972265219698, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1727999 and 1728017.

It is not a weakly prime, because it can be changed into another prime (1729043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864021 + 864022.

It is an arithmetic number, because the mean of its divisors is an integer number (864022).

2^1728043 is an apocalyptic number.

1728043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728043 is an equidigital number, since it uses as much as digits as its factorization.

1728043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1728043 is about 1314.5504935148. The cubic root of 1728043 is about 120.0009953621. Note that the first 3 decimals are identical.

The spelling of 1728043 in words is "one million, seven hundred twenty-eight thousand, forty-three".