8081945 has 8 divisors (see below), whose sum is σ = 9723336. Its totient is φ = 6448896.

The previous prime is 8081929. The next prime is 8081963. The reversal of 8081945 is 5491808.

8081945 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 123904 + 7958041 = 352^2 + 2821^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8081945 - 2⁴ = 8081929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299 + ... + 4031.

It is an arithmetic number, because the mean of its divisors is an integer number (1215417).

Almost surely, 2^8081945 is an apocalyptic number.

It is an amenable number.

8081945 is a deficient number, since it is larger than the sum of its proper divisors (1641391).

8081945 is a wasteful number, since it uses less digits than its factorization.

8081945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4171.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 8081945 is about 2842.8761844301. The cubic root of 8081945 is about 200.6805565870.

The spelling of 8081945 in words is "eight million, eighty-one thousand, nine hundred forty-five".