7981105 has 24 divisors (see below), whose sum is σ = 10867392. Its totient is φ = 5580000.

The previous prime is 7981087. The next prime is 7981123. The reversal of 7981105 is 5011897.

It is an interprime number because it is at equal distance from previous prime (7981087) and next prime (7981123).

It is not a de Polignac number, because 7981105 - 2⁹ = 7980593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 52780 + ... + 52930.

It is an arithmetic number, because the mean of its divisors is an integer number (452808).

Almost surely, 2^7981105 is an apocalyptic number.

It is an amenable number.

7981105 is a deficient number, since it is larger than the sum of its proper divisors (2886287).

7981105 is a wasteful number, since it uses less digits than its factorization.

7981105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 7981105 is about 2825.0849544748. The cubic root of 7981105 is about 199.8424175381.

The spelling of 7981105 in words is "seven million, nine hundred eighty-one thousand, one hundred five".