7872871 has 2 divisors, whose sum is σ = 7872872. Its totient is φ = 7872870.

The previous prime is 7872869. The next prime is 7872883. The reversal of 7872871 is 1782787.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7872871 - 2¹ = 7872869 is a prime.

Together with 7872869, it forms a pair of twin primes.

It is a Chen prime.

7872871 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7872671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3936435 + 3936436.

It is an arithmetic number, because the mean of its divisors is an integer number (3936436).

Almost surely, 2^7872871 is an apocalyptic number.

7872871 is a deficient number, since it is larger than the sum of its proper divisors (1).

7872871 is an equidigital number, since it uses as much as digits as its factorization.

7872871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43904, while the sum is 40.

The square root of 7872871 is about 2805.8636816496. The cubic root of 7872871 is about 198.9349298629.

The spelling of 7872871 in words is "seven million, eight hundred seventy-two thousand, eight hundred seventy-one".