42206071 has 2 divisors, whose sum is σ = 42206072. Its totient is φ = 42206070.

The previous prime is 42206057. The next prime is 42206093. The reversal of 42206071 is 17060224.

It is an a-pointer prime, because the next prime (42206093) can be obtained adding 42206071 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42206071 - 2¹⁷ = 42074999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42206041) 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, 21103035 + 21103036.

It is an arithmetic number, because the mean of its divisors is an integer number (21103036).

Almost surely, 2^42206071 is an apocalyptic number.

42206071 is a deficient number, since it is larger than the sum of its proper divisors (1).

42206071 is an equidigital number, since it uses as much as digits as its factorization.

42206071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 42206071 is about 6496.6199673369. The cubic root of 42206071 is about 348.1702358845.

Adding to 42206071 its reverse (17060224), we get a palindrome (59266295).

The spelling of 42206071 in words is "forty-two million, two hundred six thousand, seventy-one".