7842871 has 2 divisors, whose sum is σ = 7842872. Its totient is φ = 7842870.

The previous prime is 7842859. The next prime is 7842881. The reversal of 7842871 is 1782487.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7842871 - 2¹¹ = 7840823 is a prime.

7842871 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7842871.

It is a congruent number.

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, 3921435 + 3921436.

It is an arithmetic number, because the mean of its divisors is an integer number (3921436).

Almost surely, 2^7842871 is an apocalyptic number.

7842871 is a deficient number, since it is larger than the sum of its proper divisors (1).

7842871 is an equidigital number, since it uses as much as digits as its factorization.

7842871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25088, while the sum is 37.

The square root of 7842871 is about 2800.5126316444. The cubic root of 7842871 is about 198.6819241294.

It can be divided in two parts, 784 and 2871, that added together give a triangular number (3655 = T₈₅).

The spelling of 7842871 in words is "seven million, eight hundred forty-two thousand, eight hundred seventy-one".