842130185 has 16 divisors (see below), whose sum is σ = 1098284880. Its totient is φ = 616170240.

The previous prime is 842130181. The next prime is 842130229. The reversal of 842130185 is 581031248.

It can be written as a sum of positive squares in 8 ways, for example, as 110103049 + 732027136 = 10493^2 + 27056^2 .

It is not a de Polignac number, because 842130185 - 2² = 842130181 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (842130181) 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 15 ways as a sum of consecutive naturals, for example, 52346 + ... + 66515.

It is an arithmetic number, because the mean of its divisors is an integer number (68642805).

Almost surely, 2^842130185 is an apocalyptic number.

It is an amenable number.

842130185 is a deficient number, since it is larger than the sum of its proper divisors (256154695).

842130185 is a wasteful number, since it uses less digits than its factorization.

842130185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118988.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 842130185 is about 29019.4794060817. The cubic root of 842130185 is about 944.3357070070.

The spelling of 842130185 in words is "eight hundred forty-two million, one hundred thirty thousand, one hundred eighty-five".