1730561 has 4 divisors (see below), whose sum is σ = 1977792. Its totient is φ = 1483332.

The previous prime is 1730551. The next prime is 1730567. The reversal of 1730561 is 1650371.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1730561 - 2¹⁴ = 1714177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1730567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123605 + ... + 123618.

It is an arithmetic number, because the mean of its divisors is an integer number (494448).

It is a Proth number, since it is equal to 845 ⋅ 2¹¹ + 1 and 845 < 2¹¹.

2^1730561 is an apocalyptic number.

It is an amenable number.

1730561 is a deficient number, since it is larger than the sum of its proper divisors (247231).

1730561 is an equidigital number, since it uses as much as digits as its factorization.

1730561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247230.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 1730561 is about 1315.5078867114. The cubic root of 1730561 is about 120.0592531448.

The spelling of 1730561 in words is "one million, seven hundred thirty thousand, five hundred sixty-one".