42857142857129 has 2 divisors, whose sum is σ = 42857142857130. Its totient is φ = 42857142857128.

The previous prime is 42857142857107. The next prime is 42857142857197. The reversal of 42857142857129 is 92175824175824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29993443297129 + 12863699560000 = 5476627^2 + 3586600^2 .

It is a cyclic number.

It is not a de Polignac number, because 42857142857129 - 2²⁴ = 42857126079913 is a prime.

It is a super-2 number, since 2×42857142857129² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42857142857429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21428571428564 + 21428571428565.

It is an arithmetic number, because the mean of its divisors is an integer number (21428571428565).

Almost surely, 2^{42857142857129} is an apocalyptic number.

It is an amenable number.

42857142857129 is a deficient number, since it is larger than the sum of its proper divisors (1).

42857142857129 is an equidigital number, since it uses as much as digits as its factorization.

42857142857129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90316800, while the sum is 65.

The spelling of 42857142857129 in words is "forty-two trillion, eight hundred fifty-seven billion, one hundred forty-two million, eight hundred fifty-seven thousand, one hundred twenty-nine".