981005942 has 16 divisors (see below), whose sum is σ = 1682462880. Its totient is φ = 420246528.

The previous prime is 981005897. The next prime is 981005947. The reversal of 981005942 is 249500189.

It is a junction number, because it is equal to n+sod(n) for n = 981005896 and 981005905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981005947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20534 + ... + 48822.

It is an arithmetic number, because the mean of its divisors is an integer number (105153930).

Almost surely, 2^981005942 is an apocalyptic number.

981005942 is a deficient number, since it is larger than the sum of its proper divisors (701456938).

981005942 is a wasteful number, since it uses less digits than its factorization.

981005942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30775.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 981005942 is about 31321.0143833178. The cubic root of 981005942 is about 993.6281328768.

The spelling of 981005942 in words is "nine hundred eighty-one million, five thousand, nine hundred forty-two".