7871291 has 2 divisors, whose sum is σ = 7871292. Its totient is φ = 7871290.

The previous prime is 7871287. The next prime is 7871293. The reversal of 7871291 is 1921787.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7871291 - 2² = 7871287 is a prime.

Together with 7871293, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (7871293) 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, 3935645 + 3935646.

It is an arithmetic number, because the mean of its divisors is an integer number (3935646).

Almost surely, 2^7871291 is an apocalyptic number.

7871291 is a deficient number, since it is larger than the sum of its proper divisors (1).

7871291 is an equidigital number, since it uses as much as digits as its factorization.

7871291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 35.

The square root of 7871291 is about 2805.5821142857. The cubic root of 7871291 is about 198.9216209435.

The spelling of 7871291 in words is "seven million, eight hundred seventy-one thousand, two hundred ninety-one".