1728071 has 2 divisors, whose sum is σ = 1728072. Its totient is φ = 1728070.

The previous prime is 1728061. The next prime is 1728091. The reversal of 1728071 is 1708271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1728071 - 2¹⁴ = 1711687 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1728071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1728061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864035 + 864036.

It is an arithmetic number, because the mean of its divisors is an integer number (864036).

2^1728071 is an apocalyptic number.

1728071 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728071 is an equidigital number, since it uses as much as digits as its factorization.

1728071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 1728071 is about 1314.5611435000. The cubic root of 1728071 is about 120.0016434960.

The spelling of 1728071 in words is "one million, seven hundred twenty-eight thousand, seventy-one".