982181 has 4 divisors (see below), whose sum is σ = 986700. Its totient is φ = 977664.

The previous prime is 982171. The next prime is 982183. The reversal of 982181 is 181289.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 181289 = 199 ⋅911.

It can be written as a sum of positive squares in 2 ways, for example, as 919681 + 62500 = 959^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 982181 - 2⁶ = 982117 is a prime.

It is a super-2 number, since 2×982181² = 1929359033522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (982183) 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 3 ways as a sum of consecutive naturals, for example, 1916 + ... + 2373.

It is an arithmetic number, because the mean of its divisors is an integer number (246675).

2⁹⁸²¹⁸¹ is an apocalyptic number.

It is an amenable number.

982181 is a deficient number, since it is larger than the sum of its proper divisors (4519).

982181 is a wasteful number, since it uses less digits than its factorization.

982181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518.

The product of its digits is 1152, while the sum is 29.

The square root of 982181 is about 991.0504528025. The cubic root of 982181 is about 99.4024700241.

The spelling of 982181 in words is "nine hundred eighty-two thousand, one hundred eighty-one".