11142857 has 16 divisors (see below), whose sum is σ = 12870144. Its totient is φ = 9552000.

The previous prime is 11142851. The next prime is 11142869. The reversal of 11142857 is 75824111.

It is a cyclic number.

It is not a de Polignac number, because 11142857 - 2⁴ = 11142841 is a prime.

It is a Duffinian number.

11142857 is a modest number, since divided by 142857 gives 11 as remainder.

It is not an unprimeable number, because it can be changed into a prime (11142851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13583 + ... + 14379.

It is an arithmetic number, because the mean of its divisors is an integer number (804384).

Almost surely, 2^11142857 is an apocalyptic number.

It is an amenable number.

11142857 is a deficient number, since it is larger than the sum of its proper divisors (1727287).

11142857 is a wasteful number, since it uses less digits than its factorization.

11142857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880.

The product of its digits is 2240, while the sum is 29.

The square root of 11142857 is about 3338.0918201871. The cubic root of 11142857 is about 223.3566320586.

Adding to 11142857 its reverse (75824111), we get a palindrome (86966968).

The spelling of 11142857 in words is "eleven million, one hundred forty-two thousand, eight hundred fifty-seven".