491122 has 4 divisors (see below), whose sum is σ = 736686. Its totient is φ = 245560.

The previous prime is 491083. The next prime is 491129. The reversal of 491122 is 221194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221194 = 2 ⋅110597.

It can be written as a sum of positive squares in only one way, i.e., 395641 + 95481 = 629^2 + 309^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 491122.

It is not an unprimeable number, because it can be changed into a prime (491129) 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 as a sum of consecutive naturals, namely, 122779 + ... + 122782.

2⁴⁹¹¹²² is an apocalyptic number.

491122 is a deficient number, since it is larger than the sum of its proper divisors (245564).

491122 is a wasteful number, since it uses less digits than its factorization.

491122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245563.

The product of its digits is 144, while the sum is 19.

The square root of 491122 is about 700.8009703190. The cubic root of 491122 is about 78.8974795761.

The spelling of 491122 in words is "four hundred ninety-one thousand, one hundred twenty-two".