42242141 has 2 divisors, whose sum is σ = 42242142. Its totient is φ = 42242140.

The previous prime is 42242087. The next prime is 42242147. The reversal of 42242141 is 14124224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21576025 + 20666116 = 4645^2 + 4546^2 .

It is a cyclic number.

It is not a de Polignac number, because 42242141 - 2⁶ = 42242077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42242147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21121070 + 21121071.

It is an arithmetic number, because the mean of its divisors is an integer number (21121071).

Almost surely, 2^42242141 is an apocalyptic number.

It is an amenable number.

42242141 is a deficient number, since it is larger than the sum of its proper divisors (1).

42242141 is an equidigital number, since it uses as much as digits as its factorization.

42242141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 20.

The square root of 42242141 is about 6499.3954334230. The cubic root of 42242141 is about 348.2693916398.

Adding to 42242141 its reverse (14124224), we get a palindrome (56366365).

The spelling of 42242141 in words is "forty-two million, two hundred forty-two thousand, one hundred forty-one".