42857147 has 2 divisors, whose sum is σ = 42857148. Its totient is φ = 42857146.

The previous prime is 42857093. The next prime is 42857183. The reversal of 42857147 is 74175824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42857147 - 2²² = 38662843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42857147.

It is not a weakly prime, because it can be changed into another prime (42857047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21428573 + 21428574.

It is an arithmetic number, because the mean of its divisors is an integer number (21428574).

Almost surely, 2^42857147 is an apocalyptic number.

42857147 is a deficient number, since it is larger than the sum of its proper divisors (1).

42857147 is an equidigital number, since it uses as much as digits as its factorization.

42857147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62720, while the sum is 38.

The square root of 42857147 is about 6546.5370234957. The cubic root of 42857147 is about 349.9514136638.

It can be divided in two parts, 428 and 57147, that added together give a palindrome (57575).

The spelling of 42857147 in words is "forty-two million, eight hundred fifty-seven thousand, one hundred forty-seven".