7801081 has 2 divisors, whose sum is σ = 7801082. Its totient is φ = 7801080.

The previous prime is 7801069. The next prime is 7801093. The reversal of 7801081 is 1801087.

It is a balanced prime because it is at equal distance from previous prime (7801069) and next prime (7801093).

It can be written as a sum of positive squares in only one way, i.e., 7338681 + 462400 = 2709^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 7801081 - 2⁷ = 7800953 is a prime.

It is a super-2 number, since 2×7801081² = 121713729537122, which contains 22 as substring.

7801081 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7801051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3900540 + 3900541.

It is an arithmetic number, because the mean of its divisors is an integer number (3900541).

Almost surely, 2^7801081 is an apocalyptic number.

It is an amenable number.

7801081 is a deficient number, since it is larger than the sum of its proper divisors (1).

7801081 is an equidigital number, since it uses as much as digits as its factorization.

7801081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 7801081 is about 2793.0415320936. The cubic root of 7801081 is about 198.3284095161.

The spelling of 7801081 in words is "seven million, eight hundred one thousand, eighty-one".