8142857 has 2 divisors, whose sum is σ = 8142858. Its totient is φ = 8142856.

The previous prime is 8142853. The next prime is 8142907. The reversal of 8142857 is 7582418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4206601 + 3936256 = 2051^2 + 1984^2 .

It is a cyclic number.

It is not a de Polignac number, because 8142857 - 2² = 8142853 is a prime.

It is a super-2 number, since 2×8142857² = 132612240244898, which contains 22 as substring.

8142857 is a modest number, since divided by 142857 gives 8 as remainder.

It is not a weakly prime, because it can be changed into another prime (8142853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4071428 + 4071429.

It is an arithmetic number, because the mean of its divisors is an integer number (4071429).

Almost surely, 2^8142857 is an apocalyptic number.

It is an amenable number.

8142857 is a deficient number, since it is larger than the sum of its proper divisors (1).

8142857 is an equidigital number, since it uses as much as digits as its factorization.

8142857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17920, while the sum is 35.

The square root of 8142857 is about 2853.5691686027. The cubic root of 8142857 is about 201.1834583194.

The spelling of 8142857 in words is "eight million, one hundred forty-two thousand, eight hundred fifty-seven".