131142857 has 2 divisors, whose sum is σ = 131142858. Its totient is φ = 131142856.

The previous prime is 131142841. The next prime is 131142877. The reversal of 131142857 is 758241131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122522761 + 8620096 = 11069^2 + 2936^2 .

It is a cyclic number.

It is not a de Polignac number, because 131142857 - 2⁴ = 131142841 is a prime.

It is a Chen prime.

131142857 is a modest number, since divided by 142857 gives 131 as remainder.

It is not a weakly prime, because it can be changed into another prime (131142827) 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 as a sum of consecutive naturals, namely, 65571428 + 65571429.

It is an arithmetic number, because the mean of its divisors is an integer number (65571429).

Almost surely, 2^131142857 is an apocalyptic number.

It is an amenable number.

131142857 is a deficient number, since it is larger than the sum of its proper divisors (1).

131142857 is an equidigital number, since it uses as much as digits as its factorization.

131142857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 32.

The square root of 131142857 is about 11451.7621788090. The cubic root of 131142857 is about 508.0598553586.

Adding to 131142857 its reverse (758241131), we get a palindrome (889383988).

The spelling of 131142857 in words is "one hundred thirty-one million, one hundred forty-two thousand, eight hundred fifty-seven".