491975 has 12 divisors (see below), whose sum is σ = 665880. Its totient is φ = 357600.

The previous prime is 491969. The next prime is 491977. The reversal of 491975 is 579194.

It is not a de Polignac number, because 491975 - 2⁸ = 491719 is a prime.

It is a nialpdrome in base 14.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 620 + ... + 1169.

It is an arithmetic number, because the mean of its divisors is an integer number (55490).

2⁴⁹¹⁹⁷⁵ is an apocalyptic number.

491975 is a deficient number, since it is larger than the sum of its proper divisors (173905).

491975 is a wasteful number, since it uses less digits than its factorization.

491975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810 (or 1805 counting only the distinct ones).

The product of its digits is 11340, while the sum is 35.

The square root of 491975 is about 701.4092956327. The cubic root of 491975 is about 78.9431305717.

It can be divided in two parts, 4919 and 75, that added together give a palindrome (4994).

The spelling of 491975 in words is "four hundred ninety-one thousand, nine hundred seventy-five".