1705861 has 2 divisors, whose sum is σ = 1705862. Its totient is φ = 1705860.

The previous prime is 1705859. The next prime is 1705871. The reversal of 1705861 is 1685071.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1705636 + 225 = 1306^2 + 15^2 .

It is an emirp because it is prime and its reverse (1685071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1705861 - 2¹ = 1705859 is a prime.

Together with 1705859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1705871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 852930 + 852931.

It is an arithmetic number, because the mean of its divisors is an integer number (852931).

2^1705861 is an apocalyptic number.

It is an amenable number.

1705861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1705861 is an equidigital number, since it uses as much as digits as its factorization.

1705861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1705861 is about 1306.0861380476. The cubic root of 1705861 is about 119.4853188316.

The spelling of 1705861 in words is "one million, seven hundred five thousand, eight hundred sixty-one".