8120081 has 4 divisors (see below), whose sum is σ = 8473152. Its totient is φ = 7767012.

The previous prime is 8120071. The next prime is 8120113. The reversal of 8120081 is 1800218.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8120081 - 2¹⁰ = 8119057 is a prime.

It is a super-2 number, since 2×8120081² = 131871430893122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8120051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176501 + ... + 176546.

It is an arithmetic number, because the mean of its divisors is an integer number (2118288).

Almost surely, 2^8120081 is an apocalyptic number.

It is an amenable number.

8120081 is a deficient number, since it is larger than the sum of its proper divisors (353071).

8120081 is a wasteful number, since it uses less digits than its factorization.

8120081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353070.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 8120081 is about 2849.5755824333. The cubic root of 8120081 is about 200.9957095856.

Adding to 8120081 its reverse (1800218), we get a palindrome (9920299).

The spelling of 8120081 in words is "eight million, one hundred twenty thousand, eighty-one".