491275 has 12 divisors (see below), whose sum is σ = 624712. Its totient is φ = 383040.

The previous prime is 491273. The next prime is 491279. The reversal of 491275 is 572194.

It is a happy number.

It is not a de Polignac number, because 491275 - 2¹ = 491273 is a prime.

It is a super-2 number, since 2×491275² = 482702251250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 847 + ... + 1303.

2⁴⁹¹²⁷⁵ is an apocalyptic number.

491275 is a deficient number, since it is larger than the sum of its proper divisors (133437).

491275 is a wasteful number, since it uses less digits than its factorization.

491275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 505 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The square root of 491275 is about 700.9101226263. The cubic root of 491275 is about 78.9056717436.

The spelling of 491275 in words is "four hundred ninety-one thousand, two hundred seventy-five".