85142187 has 12 divisors (see below), whose sum is σ = 132443584. Its totient is φ = 52395120.

The previous prime is 85142177. The next prime is 85142201. The reversal of 85142187 is 78124158.

It is not a de Polignac number, because 85142187 - 2¹⁵ = 85109419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85142177) 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 in 11 ways as a sum of consecutive naturals, for example, 363739 + ... + 363972.

Almost surely, 2^85142187 is an apocalyptic number.

85142187 is a deficient number, since it is larger than the sum of its proper divisors (47301397).

85142187 is a wasteful number, since it uses less digits than its factorization.

85142187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727730 (or 727727 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 85142187 is about 9227.2524079490. The cubic root of 85142187 is about 439.9279961377.

It can be divided in two parts, 8514 and 2187, that added together give a palindrome (10701).

The spelling of 85142187 in words is "eighty-five million, one hundred forty-two thousand, one hundred eighty-seven".