42432161 has 2 divisors, whose sum is σ = 42432162. Its totient is φ = 42432160.

The previous prime is 42432127. The next prime is 42432167. The reversal of 42432161 is 16123424.

42432161 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., 38254225 + 4177936 = 6185^2 + 2044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42432161 is a prime.

It is a super-3 number, since 3×42432161³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42432167) 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, 21216080 + 21216081.

It is an arithmetic number, because the mean of its divisors is an integer number (21216081).

Almost surely, 2^42432161 is an apocalyptic number.

It is an amenable number.

42432161 is a deficient number, since it is larger than the sum of its proper divisors (1).

42432161 is an equidigital number, since it uses as much as digits as its factorization.

42432161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 23.

The square root of 42432161 is about 6513.9973134781. The cubic root of 42432161 is about 348.7908232767.

Adding to 42432161 its reverse (16123424), we get a palindrome (58555585).

The spelling of 42432161 in words is "forty-two million, four hundred thirty-two thousand, one hundred sixty-one".