491061 has 8 divisors (see below), whose sum is σ = 658944. Its totient is φ = 325280.

The previous prime is 491059. The next prime is 491081. The reversal of 491061 is 160194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 491061 - 2¹ = 491059 is a prime.

It is a super-2 number, since 2×491061² = 482281811442, which contains 22 as substring.

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 491061.

It is not an unprimeable number, because it can be changed into a prime (491041) 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 7 ways as a sum of consecutive naturals, for example, 145 + ... + 1001.

It is an arithmetic number, because the mean of its divisors is an integer number (82368).

2⁴⁹¹⁰⁶¹ is an apocalyptic number.

It is an amenable number.

491061 is a deficient number, since it is larger than the sum of its proper divisors (167883).

491061 is a wasteful number, since it uses less digits than its factorization.

491061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 491061 is about 700.7574473382. The cubic root of 491061 is about 78.8942129435.

The spelling of 491061 in words is "four hundred ninety-one thousand, sixty-one".