9981056 has 16 divisors (see below), whose sum is σ = 19884390. Its totient is φ = 4990464.

The previous prime is 9981053. The next prime is 9981073. The reversal of 9981056 is 6501899.

It can be written as a sum of positive squares in only one way, i.e., 8065600 + 1915456 = 2840^2 + 1384^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (9981053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38861 + ... + 39116.

Almost surely, 2^9981056 is an apocalyptic number.

It is an amenable number.

9981056 is a deficient number, since it is larger than the sum of its proper divisors (9903334).

9981056 is an equidigital number, since it uses as much as digits as its factorization.

9981056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77991 (or 77979 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 9981056 is about 3159.2809308449. The cubic root of 9981056 is about 215.3073376353.

The spelling of 9981056 in words is "nine million, nine hundred eighty-one thousand, fifty-six".