190142857 has 8 divisors (see below), whose sum is σ = 191864456. Its totient is φ = 188428032.

The previous prime is 190142837. The next prime is 190142921. The reversal of 190142857 is 758241091.

190142857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6702921 + 183439936 = 2589^2 + 13544^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190142857 is a prime.

It is a Duffinian number.

190142857 is a modest number, since divided by 142857 gives 190 as remainder.

It is not an unprimeable number, because it can be changed into a prime (190142837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66583 + ... + 69379.

It is an arithmetic number, because the mean of its divisors is an integer number (23983057).

Almost surely, 2^190142857 is an apocalyptic number.

It is an amenable number.

190142857 is a deficient number, since it is larger than the sum of its proper divisors (1721599).

190142857 is a wasteful number, since it uses less digits than its factorization.

190142857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 190142857 is about 13789.2297464362. The cubic root of 190142857 is about 575.0337542882.

The spelling of 190142857 in words is "one hundred ninety million, one hundred forty-two thousand, eight hundred fifty-seven".