42015244129 has 2 divisors, whose sum is σ = 42015244130. Its totient is φ = 42015244128.

The previous prime is 42015244123. The next prime is 42015244169. The reversal of 42015244129 is 92144251024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29591912529 + 12423331600 = 172023^2 + 111460^2 .

It is a cyclic number.

It is not a de Polignac number, because 42015244129 - 2⁷ = 42015244001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42015244094 and 42015244103.

It is not a weakly prime, because it can be changed into another prime (42015244123) 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, 21007622064 + 21007622065.

It is an arithmetic number, because the mean of its divisors is an integer number (21007622065).

Almost surely, 2^42015244129 is an apocalyptic number.

It is an amenable number.

42015244129 is a deficient number, since it is larger than the sum of its proper divisors (1).

42015244129 is an equidigital number, since it uses as much as digits as its factorization.

42015244129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 42015244129 in words is "forty-two billion, fifteen million, two hundred forty-four thousand, one hundred twenty-nine".