7142857142858 has 4 divisors (see below), whose sum is σ = 10714285714290. Its totient is φ = 3571428571428.

The previous prime is 7142857142857. The next prime is 7142857142881. The reversal of 7142857142858 is 8582417582417.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6525097298329 + 617759844529 = 2554427^2 + 785977^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7142857142858.

It is not an unprimeable number, because it can be changed into a prime (7142857142857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1785714285713 + ... + 1785714285716.

Almost surely, 2^{7142857142858} is an apocalyptic number.

7142857142858 is a deficient number, since it is larger than the sum of its proper divisors (3571428571432).

7142857142858 is a wasteful number, since it uses less digits than its factorization.

7142857142858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571428571431.

The product of its digits is 40140800, while the sum is 62.

The spelling of 7142857142858 in words is "seven trillion, one hundred forty-two billion, eight hundred fifty-seven million, one hundred forty-two thousand, eight hundred fifty-eight".