491272 has 8 divisors (see below), whose sum is σ = 921150. Its totient is φ = 245632.

The previous prime is 491261. The next prime is 491273. The reversal of 491272 is 272194.

It can be written as a sum of positive squares in only one way, i.e., 285156 + 206116 = 534^2 + 454^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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

491272 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30697 + ... + 30712.

2⁴⁹¹²⁷² is an apocalyptic number.

It is an amenable number.

491272 is a deficient number, since it is larger than the sum of its proper divisors (429878).

491272 is a wasteful number, since it uses less digits than its factorization.

491272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61415 (or 61411 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 491272 is about 700.9079825484. The cubic root of 491272 is about 78.9055111292.

The spelling of 491272 in words is "four hundred ninety-one thousand, two hundred seventy-two".