42642250129 has 2 divisors, whose sum is σ = 42642250130. Its totient is φ = 42642250128.

The previous prime is 42642249989. The next prime is 42642250153. The reversal of 42642250129 is 92105224624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42518440000 + 123810129 = 206200^2 + 11127^2 .

It is a cyclic number.

It is not a de Polignac number, because 42642250129 - 2¹⁷ = 42642119057 is a prime.

It is a super-2 number, since 2×42642250129² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42642250199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21321125064 + 21321125065.

It is an arithmetic number, because the mean of its divisors is an integer number (21321125065).

Almost surely, 2^42642250129 is an apocalyptic number.

It is an amenable number.

42642250129 is a deficient number, since it is larger than the sum of its proper divisors (1).

42642250129 is an equidigital number, since it uses as much as digits as its factorization.

42642250129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 42642250129 in words is "forty-two billion, six hundred forty-two million, two hundred fifty thousand, one hundred twenty-nine".