1729085 has 4 divisors (see below), whose sum is σ = 2074908. Its totient is φ = 1383264.

The previous prime is 1729051. The next prime is 1729103. The reversal of 1729085 is 5809271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1207801 + 521284 = 1099^2 + 722^2 .

It is a cyclic number.

It is not a de Polignac number, because 1729085 - 2¹⁰ = 1728061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 172904 + ... + 172913.

It is an arithmetic number, because the mean of its divisors is an integer number (518727).

2^1729085 is an apocalyptic number.

It is an amenable number.

1729085 is a deficient number, since it is larger than the sum of its proper divisors (345823).

1729085 is an equidigital number, since it uses as much as digits as its factorization.

1729085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345822.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1729085 is about 1314.9467669834. The cubic root of 1729085 is about 120.0251104859.

The spelling of 1729085 in words is "one million, seven hundred twenty-nine thousand, eighty-five".