8240081 has 2 divisors, whose sum is σ = 8240082. Its totient is φ = 8240080.

The previous prime is 8240077. The next prime is 8240083. The reversal of 8240081 is 1800428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6838225 + 1401856 = 2615^2 + 1184^2 .

It is a cyclic number.

It is not a de Polignac number, because 8240081 - 2² = 8240077 is a prime.

It is a super-2 number, since 2×8240081² = 135797869773122, which contains 22 as substring.

Together with 8240083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8240083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4120040 + 4120041.

It is an arithmetic number, because the mean of its divisors is an integer number (4120041).

Almost surely, 2^8240081 is an apocalyptic number.

It is an amenable number.

8240081 is a deficient number, since it is larger than the sum of its proper divisors (1).

8240081 is an equidigital number, since it uses as much as digits as its factorization.

8240081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 8240081 is about 2870.5541276903. The cubic root of 8240081 is about 201.9809886366.

The spelling of 8240081 in words is "eight million, two hundred forty thousand, eighty-one".