42142134149 has 2 divisors, whose sum is σ = 42142134150. Its totient is φ = 42142134148.

The previous prime is 42142134113. The next prime is 42142134161. The reversal of 42142134149 is 94143124124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41718062500 + 424071649 = 204250^2 + 20593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42142134149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42142134109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21071067074 + 21071067075.

It is an arithmetic number, because the mean of its divisors is an integer number (21071067075).

Almost surely, 2^42142134149 is an apocalyptic number.

It is an amenable number.

42142134149 is a deficient number, since it is larger than the sum of its proper divisors (1).

42142134149 is an equidigital number, since it uses as much as digits as its factorization.

42142134149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 35.

The spelling of 42142134149 in words is "forty-two billion, one hundred forty-two million, one hundred thirty-four thousand, one hundred forty-nine".