7842881 has 2 divisors, whose sum is σ = 7842882. Its totient is φ = 7842880.

The previous prime is 7842871. The next prime is 7842917. The reversal of 7842881 is 1882487.

It is a happy number.

7842881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5640625 + 2202256 = 2375^2 + 1484^2 .

It is a cyclic number.

It is not a de Polignac number, because 7842881 - 2¹⁸ = 7580737 is a prime.

It is a super-2 number, since 2×7842881² = 123021564760322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7842851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3921440 + 3921441.

It is an arithmetic number, because the mean of its divisors is an integer number (3921441).

Almost surely, 2^7842881 is an apocalyptic number.

It is an amenable number.

7842881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7842881 is an equidigital number, since it uses as much as digits as its factorization.

7842881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28672, while the sum is 38.

The square root of 7842881 is about 2800.5144170313. The cubic root of 7842881 is about 198.6820085720.

The spelling of 7842881 in words is "seven million, eight hundred forty-two thousand, eight hundred eighty-one".