981185 has 8 divisors (see below), whose sum is σ = 1197096. Its totient is φ = 771840.

The previous prime is 981173. The next prime is 981187. The reversal of 981185 is 581189.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 61504 + 919681 = 248^2 + 959^2 .

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

It is not a de Polignac number, because 981185 - 2¹⁸ = 719041 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 981185.

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

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, 1304 + ... + 1913.

It is an arithmetic number, because the mean of its divisors is an integer number (149637).

2⁹⁸¹¹⁸⁵ is an apocalyptic number.

It is an amenable number.

981185 is a deficient number, since it is larger than the sum of its proper divisors (215911).

981185 is a wasteful number, since it uses less digits than its factorization.

981185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283.

The product of its digits is 2880, while the sum is 32.

The square root of 981185 is about 990.5478282244. The cubic root of 981185 is about 99.3688583154.

The spelling of 981185 in words is "nine hundred eighty-one thousand, one hundred eighty-five".