8442981 has 8 divisors (see below), whose sum is σ = 12508160. Its totient is φ = 5628636.

The previous prime is 8442979. The next prime is 8442997. The reversal of 8442981 is 1892448.

It is not a de Polignac number, because 8442981 - 2¹ = 8442979 is a prime.

It is a super-2 number, since 2×8442981² = 142567856332722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8442901) 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, 156325 + ... + 156378.

It is an arithmetic number, because the mean of its divisors is an integer number (1563520).

Almost surely, 2^8442981 is an apocalyptic number.

It is an amenable number.

8442981 is a deficient number, since it is larger than the sum of its proper divisors (4065179).

8442981 is a wasteful number, since it uses less digits than its factorization.

8442981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312712 (or 312706 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 8442981 is about 2905.6808152307. The cubic root of 8442981 is about 203.6253938449.

The spelling of 8442981 in words is "eight million, four hundred forty-two thousand, nine hundred eighty-one".