42857142857197 has 2 divisors, whose sum is σ = 42857142857198. Its totient is φ = 42857142857196.

The previous prime is 42857142857129. The next prime is 42857142857257. The reversal of 42857142857197 is 79175824175824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31061070976516 + 11796071880681 = 5573246^2 + 3434541^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42857142857197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42857142857107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21428571428598 + 21428571428599.

It is an arithmetic number, because the mean of its divisors is an integer number (21428571428599).

Almost surely, 2^{42857142857197} is an apocalyptic number.

It is an amenable number.

42857142857197 is a deficient number, since it is larger than the sum of its proper divisors (1).

42857142857197 is an equidigital number, since it uses as much as digits as its factorization.

42857142857197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 316108800, while the sum is 70.

The spelling of 42857142857197 in words is "forty-two trillion, eight hundred fifty-seven billion, one hundred forty-two million, eight hundred fifty-seven thousand, one hundred ninety-seven".