42665141 has 2 divisors, whose sum is σ = 42665142. Its totient is φ = 42665140.

The previous prime is 42665137. The next prime is 42665171. The reversal of 42665141 is 14156624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36857041 + 5808100 = 6071^2 + 2410^2 .

It is a cyclic number.

It is not a de Polignac number, because 42665141 - 2² = 42665137 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42665101) 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, 21332570 + 21332571.

It is an arithmetic number, because the mean of its divisors is an integer number (21332571).

Almost surely, 2^42665141 is an apocalyptic number.

It is an amenable number.

42665141 is a deficient number, since it is larger than the sum of its proper divisors (1).

42665141 is an equidigital number, since it uses as much as digits as its factorization.

42665141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 29.

The square root of 42665141 is about 6531.8558618512. The cubic root of 42665141 is about 349.4280208680.

The spelling of 42665141 in words is "forty-two million, six hundred sixty-five thousand, one hundred forty-one".