1706 has 4 divisors (see below), whose sum is σ = 2562. Its totient is φ = 852.

The previous prime is 1699. The next prime is 1709. The reversal of 1706 is 6071.

It is a happy number.

1706 is nontrivially palindromic in base 3.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6071 = 13 ⋅467.

It can be written as a sum of positive squares in only one way, i.e., 1681 + 25 = 41^2 + 5^2 .

It is a Curzon number.

It is a plaindrome in base 4, base 14, base 15 and base 16.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (1709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425 + ... + 428.

2¹⁷⁰⁶ is an apocalyptic number.

1706 is a deficient number, since it is larger than the sum of its proper divisors (856).

1706 is an equidigital number, since it uses as much as digits as its factorization.

1706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 1706 is about 41.3037528561. The cubic root of 1706 is about 11.9488564115.

Adding to 1706 its reverse (6071), we get a palindrome (7777).

It can be divided in two parts, 1 and 706, that added together give a palindrome (707).

The spelling of 1706 in words is "one thousand, seven hundred six".