42178417 has 2 divisors, whose sum is σ = 42178418. Its totient is φ = 42178416.

The previous prime is 42178403. The next prime is 42178421. The reversal of 42178417 is 71487124.

42178417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42042256 + 136161 = 6484^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 42178417 - 2¹¹ = 42176369 is a prime.

It is not a weakly prime, because it can be changed into another prime (42178447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21089208 + 21089209.

It is an arithmetic number, because the mean of its divisors is an integer number (21089209).

Almost surely, 2^42178417 is an apocalyptic number.

It is an amenable number.

42178417 is a deficient number, since it is larger than the sum of its proper divisors (1).

42178417 is an equidigital number, since it uses as much as digits as its factorization.

42178417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12544, while the sum is 34.

The square root of 42178417 is about 6494.4912810781. The cubic root of 42178417 is about 348.0941772899.

The spelling of 42178417 in words is "forty-two million, one hundred seventy-eight thousand, four hundred seventeen".