85140851 has 2 divisors, whose sum is σ = 85140852. Its totient is φ = 85140850.

The previous prime is 85140841. The next prime is 85140889. The reversal of 85140851 is 15804158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85140851 - 2¹⁴ = 85124467 is a prime.

It is not a weakly prime, because it can be changed into another prime (85140841) 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, 42570425 + 42570426.

It is an arithmetic number, because the mean of its divisors is an integer number (42570426).

Almost surely, 2^85140851 is an apocalyptic number.

85140851 is a deficient number, since it is larger than the sum of its proper divisors (1).

85140851 is an equidigital number, since it uses as much as digits as its factorization.

85140851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 85140851 is about 9227.1800134169. The cubic root of 85140851 is about 439.9256950971.

The spelling of 85140851 in words is "eighty-five million, one hundred forty thousand, eight hundred fifty-one".