42841217 has 2 divisors, whose sum is σ = 42841218. Its totient is φ = 42841216.

The previous prime is 42841193. The next prime is 42841247. The reversal of 42841217 is 71214824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39488656 + 3352561 = 6284^2 + 1831^2 .

It is a cyclic number.

It is not a de Polignac number, because 42841217 - 2²² = 38646913 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42841217.

It is not a weakly prime, because it can be changed into another prime (42841247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21420608 + 21420609.

It is an arithmetic number, because the mean of its divisors is an integer number (21420609).

Almost surely, 2^42841217 is an apocalyptic number.

It is an amenable number.

42841217 is a deficient number, since it is larger than the sum of its proper divisors (1).

42841217 is an equidigital number, since it uses as much as digits as its factorization.

42841217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 29.

The square root of 42841217 is about 6545.3202366271. The cubic root of 42841217 is about 349.9080493146.

The spelling of 42841217 in words is "forty-two million, eight hundred forty-one thousand, two hundred seventeen".