510491 has 4 divisors (see below), whose sum is σ = 522984. Its totient is φ = 498000.

The previous prime is 510481. The next prime is 510529. The reversal of 510491 is 194015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194015 = 5 ⋅38803.

It is a cyclic number.

It is not a de Polignac number, because 510491 - 2¹⁴ = 494107 is a prime.

It is a super-2 number, since 2×510491² = 521202122162, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 510491.

It is not an unprimeable number, because it can be changed into a prime (510401) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 6185 + ... + 6266.

It is an arithmetic number, because the mean of its divisors is an integer number (130746).

2⁵¹⁰⁴⁹¹ is an apocalyptic number.

510491 is a deficient number, since it is larger than the sum of its proper divisors (12493).

510491 is a wasteful number, since it uses less digits than its factorization.

510491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12492.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 510491 is about 714.4865289143. The cubic root of 510491 is about 79.9213289111.

It can be divided in two parts, 5104 and 91, that multiplied together give a palindrome (464464).

The spelling of 510491 in words is "five hundred ten thousand, four hundred ninety-one".