516506 has 4 divisors (see below), whose sum is σ = 774762. Its totient is φ = 258252.

The previous prime is 516499. The next prime is 516517. The reversal of 516506 is 605615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605615 = 5 ⋅121123.

It can be written as a sum of positive squares in only one way, i.e., 410881 + 105625 = 641^2 + 325^2 .

It is an unprimeable number.

516506 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129125 + ... + 129128.

2⁵¹⁶⁵⁰⁶ is an apocalyptic number.

516506 is a deficient number, since it is larger than the sum of its proper divisors (258256).

516506 is a wasteful number, since it uses less digits than its factorization.

516506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258255.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 516506 is about 718.6835186645. The cubic root of 516506 is about 80.2340023688.

The spelling of 516506 in words is "five hundred sixteen thousand, five hundred six".