981140 has 12 divisors (see below), whose sum is σ = 2060436. Its totient is φ = 392448.

The previous prime is 981139. The next prime is 981151. The reversal of 981140 is 41189.

It can be written as a sum of positive squares in 2 ways, for example, as 586756 + 394384 = 766^2 + 628^2 .

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 981140.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 24509 + ... + 24548.

It is an arithmetic number, because the mean of its divisors is an integer number (171703).

2⁹⁸¹¹⁴⁰ is an apocalyptic number.

It is an amenable number.

981140 is an abundant number, since it is smaller than the sum of its proper divisors (1079296).

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

981140 is a wasteful number, since it uses less digits than its factorization.

981140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49066 (or 49064 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 981140 is about 990.5251132606. The cubic root of 981140 is about 99.3673391771.

The spelling of 981140 in words is "nine hundred eighty-one thousand, one hundred forty".