7681105 has 4 divisors (see below), whose sum is σ = 9217332. Its totient is φ = 6144880.

The previous prime is 7681039. The next prime is 7681109. The reversal of 7681105 is 5011867.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4112784 + 3568321 = 2028^2 + 1889^2 .

It is not a de Polignac number, because 7681105 - 2¹³ = 7672913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7681109) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 768106 + ... + 768115.

It is an arithmetic number, because the mean of its divisors is an integer number (2304333).

Almost surely, 2^7681105 is an apocalyptic number.

It is an amenable number.

7681105 is a deficient number, since it is larger than the sum of its proper divisors (1536227).

7681105 is a wasteful number, since it uses less digits than its factorization.

7681105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536226.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 7681105 is about 2771.4806512043. The cubic root of 7681105 is about 197.3064278688.

The spelling of 7681105 in words is "seven million, six hundred eighty-one thousand, one hundred five".