8081605 has 16 divisors (see below), whose sum is σ = 11142144. Its totient is φ = 5512320.

The previous prime is 8081581. The next prime is 8081629. The reversal of 8081605 is 5061808.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8081581) and next prime (8081629).

It is not a de Polignac number, because 8081605 - 2⁵ = 8081573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7660 + ... + 8650.

It is an arithmetic number, because the mean of its divisors is an integer number (696384).

Almost surely, 2^8081605 is an apocalyptic number.

It is an amenable number.

8081605 is a deficient number, since it is larger than the sum of its proper divisors (3060539).

8081605 is a wasteful number, since it uses less digits than its factorization.

8081605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 8081605 is about 2842.8163852068. The cubic root of 8081605 is about 200.6777423986.

The spelling of 8081605 in words is "eight million, eighty-one thousand, six hundred five".