984142857 has 32 divisors (see below), whose sum is σ = 1360558080. Its totient is φ = 632499840.

The previous prime is 984142813. The next prime is 984142933. The reversal of 984142857 is 758241489.

It is a happy number.

It is not a de Polignac number, because 984142857 - 2¹⁰ = 984141833 is a prime.

984142857 is a modest number, since divided by 142857 gives 984 as remainder.

It is not an unprimeable number, because it can be changed into a prime (984142807) 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 31 ways as a sum of consecutive naturals, for example, 2596494 + ... + 2596872.

It is an arithmetic number, because the mean of its divisors is an integer number (42517440).

Almost surely, 2^984142857 is an apocalyptic number.

It is an amenable number.

984142857 is a deficient number, since it is larger than the sum of its proper divisors (376415223).

984142857 is a wasteful number, since it uses less digits than its factorization.

984142857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693.

The product of its digits is 645120, while the sum is 48.

The square root of 984142857 is about 31371.0512574890. The cubic root of 984142857 is about 994.6860981308.

The spelling of 984142857 in words is "nine hundred eighty-four million, one hundred forty-two thousand, eight hundred fifty-seven".