491575 has 18 divisors (see below), whose sum is σ = 710024. Its totient is φ = 330720.

The previous prime is 491539. The next prime is 491581. The reversal of 491575 is 575194.

It is not a de Polignac number, because 491575 - 2¹⁵ = 458807 is a prime.

491575 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9249 + ... + 9301.

2⁴⁹¹⁵⁷⁵ is an apocalyptic number.

491575 is a deficient number, since it is larger than the sum of its proper divisors (218449).

491575 is an equidigital number, since it uses as much as digits as its factorization.

491575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 65 counting only the distinct ones).

The product of its digits is 6300, while the sum is 31.

The square root of 491575 is about 701.1240974321. The cubic root of 491575 is about 78.9217298813.

Multiplying 491575 by its product of digits (6300), we get a square (3096922500 = 55650²).

The spelling of 491575 in words is "four hundred ninety-one thousand, five hundred seventy-five".