508491 has 16 divisors (see below), whose sum is σ = 775200. Its totient is φ = 329184.

The previous prime is 508489. The next prime is 508499. The reversal of 508491 is 194805.

It is not a de Polignac number, because 508491 - 2¹ = 508489 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (508499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 745 + ... + 1253.

It is an arithmetic number, because the mean of its divisors is an integer number (48450).

2⁵⁰⁸⁴⁹¹ is an apocalyptic number.

508491 is a deficient number, since it is larger than the sum of its proper divisors (266709).

508491 is a wasteful number, since it uses less digits than its factorization.

508491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 508491 is about 713.0855488649. The cubic root of 508491 is about 79.8168204692.

It can be divided in two parts, 508 and 491, that added together give a palindrome (999).

The spelling of 508491 in words is "five hundred eight thousand, four hundred ninety-one".