42194161 has 2 divisors, whose sum is σ = 42194162. Its totient is φ = 42194160.

The previous prime is 42194143. The next prime is 42194179. The reversal of 42194161 is 16149124.

42194161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (42194143) and next prime (42194179).

It can be written as a sum of positive squares in only one way, i.e., 30735936 + 11458225 = 5544^2 + 3385^2 .

It is a cyclic number.

It is not a de Polignac number, because 42194161 - 2⁹ = 42193649 is a prime.

It is not a weakly prime, because it can be changed into another prime (42194111) 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, 21097080 + 21097081.

It is an arithmetic number, because the mean of its divisors is an integer number (21097081).

Almost surely, 2^42194161 is an apocalyptic number.

It is an amenable number.

42194161 is a deficient number, since it is larger than the sum of its proper divisors (1).

42194161 is an equidigital number, since it uses as much as digits as its factorization.

42194161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The square root of 42194161 is about 6495.7032721638. The cubic root of 42194161 is about 348.1374831113.

The spelling of 42194161 in words is "forty-two million, one hundred ninety-four thousand, one hundred sixty-one".