851212870 has 16 divisors (see below), whose sum is σ = 1533404160. Its totient is φ = 340213824.

The previous prime is 851212867. The next prime is 851212871. The reversal of 851212870 is 78212158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851212871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20487 + ... + 46066.

It is an arithmetic number, because the mean of its divisors is an integer number (95837760).

Almost surely, 2^851212870 is an apocalyptic number.

851212870 is a deficient number, since it is larger than the sum of its proper divisors (682191290).

851212870 is a wasteful number, since it uses less digits than its factorization.

851212870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67839.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 851212870 is about 29175.5526083055. The cubic root of 851212870 is about 947.7185772627.

The spelling of 851212870 in words is "eight hundred fifty-one million, two hundred twelve thousand, eight hundred seventy".