42342161 has 2 divisors, whose sum is σ = 42342162. Its totient is φ = 42342160.

The previous prime is 42342151. The next prime is 42342169. The reversal of 42342161 is 16124324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21911761 + 20430400 = 4681^2 + 4520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42342161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42342169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21171080 + 21171081.

It is an arithmetic number, because the mean of its divisors is an integer number (21171081).

Almost surely, 2^42342161 is an apocalyptic number.

It is an amenable number.

42342161 is a deficient number, since it is larger than the sum of its proper divisors (1).

42342161 is an equidigital number, since it uses as much as digits as its factorization.

42342161 is an evil number, because the sum of its binary digits is even.

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

The square root of 42342161 is about 6507.0854458813. The cubic root of 42342161 is about 348.5440498117.

Adding to 42342161 its reverse (16124324), we get a palindrome (58466485).

The spelling of 42342161 in words is "forty-two million, three hundred forty-two thousand, one hundred sixty-one".