2001705 has 8 divisors (see below), whose sum is σ = 3202752. Its totient is φ = 1067568.

The previous prime is 2001697. The next prime is 2001709. The reversal of 2001705 is 5071002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2001705 - 2³ = 2001697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 133447 = 2001705 / (2 + 0 + 0 + 1 + 7 + 0 + 5).

It is not an unprimeable number, because it can be changed into a prime (2001709) 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 in 7 ways as a sum of consecutive naturals, for example, 66709 + ... + 66738.

It is an arithmetic number, because the mean of its divisors is an integer number (400344).

2^2001705 is an apocalyptic number.

It is an amenable number.

2001705 is a deficient number, since it is larger than the sum of its proper divisors (1201047).

2001705 is a wasteful number, since it uses less digits than its factorization.

2001705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133455.

The product of its (nonzero) digits is 70, while the sum is 15.

The square root of 2001705 is about 1414.8162424852. The cubic root of 2001705 is about 126.0278975769.

Adding to 2001705 its reverse (5071002), we get a palindrome (7072707).

The spelling of 2001705 in words is "two million, one thousand, seven hundred five".