1729001 has 2 divisors, whose sum is σ = 1729002. Its totient is φ = 1729000.

The previous prime is 1728997. The next prime is 1729033. The reversal of 1729001 is 1009271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1638400 + 90601 = 1280^2 + 301^2 .

It is a cyclic number.

It is not a de Polignac number, because 1729001 - 2² = 1728997 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1729051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864500 + 864501.

It is an arithmetic number, because the mean of its divisors is an integer number (864501).

2^1729001 is an apocalyptic number.

It is an amenable number.

1729001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1729001 is an equidigital number, since it uses as much as digits as its factorization.

1729001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 1729001 is about 1314.9148261389. The cubic root of 1729001 is about 120.0231668235.

The spelling of 1729001 in words is "one million, seven hundred twenty-nine thousand, one".