42142605697 has 2 divisors, whose sum is σ = 42142605698. Its totient is φ = 42142605696.

The previous prime is 42142605689. The next prime is 42142605709. The reversal of 42142605697 is 79650624124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27805896001 + 14336709696 = 166751^2 + 119736^2 .

It is a cyclic number.

It is not a de Polignac number, because 42142605697 - 2³ = 42142605689 is a prime.

It is not a weakly prime, because it can be changed into another prime (42142605797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21071302848 + 21071302849.

It is an arithmetic number, because the mean of its divisors is an integer number (21071302849).

Almost surely, 2^42142605697 is an apocalyptic number.

It is an amenable number.

42142605697 is a deficient number, since it is larger than the sum of its proper divisors (1).

42142605697 is an equidigital number, since it uses as much as digits as its factorization.

42142605697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 42142605697 in words is "forty-two billion, one hundred forty-two million, six hundred five thousand, six hundred ninety-seven".