981186 has 16 divisors (see below), whose sum is σ = 2030400. Its totient is φ = 315728.

The previous prime is 981173. The next prime is 981187. The reversal of 981186 is 681189.

981186 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981187) by changing a digit.

981186 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 in 7 ways as a sum of consecutive naturals, for example, 2646 + ... + 2993.

It is an arithmetic number, because the mean of its divisors is an integer number (126900).

2⁹⁸¹¹⁸⁶ is an apocalyptic number.

981186 is an abundant number, since it is smaller than the sum of its proper divisors (1049214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

981186 is a wasteful number, since it uses less digits than its factorization.

981186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5673.

The product of its digits is 3456, while the sum is 33.

The square root of 981186 is about 990.5483329954. The cubic root of 981186 is about 99.3688920735.

The spelling of 981186 in words is "nine hundred eighty-one thousand, one hundred eighty-six".