42188017 has 2 divisors, whose sum is σ = 42188018. Its totient is φ = 42188016.

The previous prime is 42187997. The next prime is 42188039. The reversal of 42188017 is 71088124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39828721 + 2359296 = 6311^2 + 1536^2 .

It is a cyclic number.

It is not a de Polignac number, because 42188017 - 2¹⁵ = 42155249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42188017.

It is not a weakly prime, because it can be changed into another prime (42188317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21094008 + 21094009.

It is an arithmetic number, because the mean of its divisors is an integer number (21094009).

Almost surely, 2^42188017 is an apocalyptic number.

It is an amenable number.

42188017 is a deficient number, since it is larger than the sum of its proper divisors (1).

42188017 is an equidigital number, since it uses as much as digits as its factorization.

42188017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 42188017 is about 6495.2303269399. The cubic root of 42188017 is about 348.1205845604.

The spelling of 42188017 in words is "forty-two million, one hundred eighty-eight thousand, seventeen".