491775 has 24 divisors (see below), whose sum is σ = 833280. Its totient is φ = 255840.

The previous prime is 491773. The next prime is 491783. The reversal of 491775 is 577194.

It is not a de Polignac number, because 491775 - 2¹ = 491773 is a prime.

It is a super-3 number, since 3×491775³ = 356796508533328125, which contains 333 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 491775.

It is not an unprimeable number, because it can be changed into a prime (491773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5884 + ... + 5966.

It is an arithmetic number, because the mean of its divisors is an integer number (34720).

2⁴⁹¹⁷⁷⁵ is an apocalyptic number.

491775 is a deficient number, since it is larger than the sum of its proper divisors (341505).

491775 is a wasteful number, since it uses less digits than its factorization.

491775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 170 counting only the distinct ones).

The product of its digits is 8820, while the sum is 33.

The square root of 491775 is about 701.2667110308. The cubic root of 491775 is about 78.9324316771.

The spelling of 491775 in words is "four hundred ninety-one thousand, seven hundred seventy-five".