981136 has 40 divisors (see below), whose sum is σ = 2109240. Its totient is φ = 439296.

The previous prime is 981133. The next prime is 981137. The reversal of 981136 is 631189.

It is a happy number.

981136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 20736 + 960400 = 144^2 + 980^2 .

It is not an unprimeable number, because it can be changed into a prime (981133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10980 + ... + 11068.

It is an arithmetic number, because the mean of its divisors is an integer number (52731).

2⁹⁸¹¹³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1054620).

981136 is an abundant number, since it is smaller than the sum of its proper divisors (1128104).

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

981136 is a wasteful number, since it uses less digits than its factorization.

981136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 157 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 981136 is about 990.5230941275. The cubic root of 981136 is about 99.3672041404.

The spelling of 981136 in words is "nine hundred eighty-one thousand, one hundred thirty-six".