3081305 has 4 divisors (see below), whose sum is σ = 3697572. Its totient is φ = 2465040.

The previous prime is 3081271. The next prime is 3081311. The reversal of 3081305 is 5031803.

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 2446096 + 635209 = 1564^2 + 797^2 .

It is not a de Polignac number, because 3081305 - 2¹⁶ = 3015769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308126 + ... + 308135.

It is an arithmetic number, because the mean of its divisors is an integer number (924393).

Almost surely, 2^3081305 is an apocalyptic number.

It is an amenable number.

3081305 is a deficient number, since it is larger than the sum of its proper divisors (616267).

3081305 is an equidigital number, since it uses as much as digits as its factorization.

3081305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616266.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 3081305 is about 1755.3646344848. The cubic root of 3081305 is about 145.5162729838.

The spelling of 3081305 in words is "three million, eighty-one thousand, three hundred five".