1000442981 has 4 divisors (see below), whose sum is σ = 1006580832. Its totient is φ = 994305132.

The previous prime is 1000442959. The next prime is 1000443001. The reversal of 1000442981 is 1892440001.

1000442981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1892440001 = 239 ⋅7918159.

It is a cyclic number.

It is not a de Polignac number, because 1000442981 - 2¹⁸ = 1000180837 is a prime.

It is a super-2 number, since 2×1000442981² = 2001772316464332722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000442941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3068681 + ... + 3069006.

It is an arithmetic number, because the mean of its divisors is an integer number (251645208).

Almost surely, 2^1000442981 is an apocalyptic number.

It is an amenable number.

1000442981 is a deficient number, since it is larger than the sum of its proper divisors (6137851).

1000442981 is an equidigital number, since it uses as much as digits as its factorization.

1000442981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6137850.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 1000442981 is about 31629.7799707807. The cubic root of 1000442981 is about 1000.1476385351.

Adding to 1000442981 its reverse (1892440001), we get a palindrome (2892882982).

The spelling of 1000442981 in words is "one billion, four hundred forty-two thousand, nine hundred eighty-one".