1705705 has 4 divisors (see below), whose sum is σ = 2046852. Its totient is φ = 1364560.

The previous prime is 1705679. The next prime is 1705721. The reversal of 1705705 is 5075071.

1705705 = 923² + 924².

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 851929 + 853776 = 923^2 + 924^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1705705 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1705705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170566 + ... + 170575.

It is an arithmetic number, because the mean of its divisors is an integer number (511713).

2^1705705 is an apocalyptic number.

1705705 is the 924-th centered square number.

It is an amenable number.

1705705 is a deficient number, since it is larger than the sum of its proper divisors (341147).

1705705 is an equidigital number, since it uses as much as digits as its factorization.

1705705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341146.

The product of its (nonzero) digits is 1225, while the sum is 25.

The square root of 1705705 is about 1306.0264162719. The cubic root of 1705705 is about 119.4816764328.

It can be divided in two parts, 1705 and 705, that multiplied together give a triangular number (1202025 = T₁₅₅₀).

The spelling of 1705705 in words is "one million, seven hundred five thousand, seven hundred five".