851212871 has 2 divisors, whose sum is σ = 851212872. Its totient is φ = 851212870.

The previous prime is 851212867. The next prime is 851212877. The reversal of 851212871 is 178212158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 851212871 - 2² = 851212867 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851212877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425606435 + 425606436.

It is an arithmetic number, because the mean of its divisors is an integer number (425606436).

Almost surely, 2^851212871 is an apocalyptic number.

851212871 is a deficient number, since it is larger than the sum of its proper divisors (1).

851212871 is an equidigital number, since it uses as much as digits as its factorization.

851212871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 35.

The square root of 851212871 is about 29175.5526254431. The cubic root of 851212871 is about 947.7185776339.

The spelling of 851212871 in words is "eight hundred fifty-one million, two hundred twelve thousand, eight hundred seventy-one".