3506 has 4 divisors (see below), whose sum is σ = 5262. Its totient is φ = 1752.

The previous prime is 3499. The next prime is 3511. The reversal of 3506 is 6053.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3481 + 25 = 59^2 + 5^2 .

It is a Curzon number.

It is a plaindrome in base 13.

It is a nialpdrome in base 8 and base 16.

It is an unprimeable number.

3506 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 875 + ... + 878.

3506 is a deficient number, since it is larger than the sum of its proper divisors (1756).

3506 is a wasteful number, since it uses less digits than its factorization.

3506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 3506 is about 59.2114853723. The cubic root of 3506 is about 15.1916158749.

Adding to 3506 its reverse (6053), we get a palindrome (9559).

The spelling of 3506 in words is "three thousand, five hundred six".