42402442129 has 2 divisors, whose sum is σ = 42402442130. Its totient is φ = 42402442128.

The previous prime is 42402442127. The next prime is 42402442141. The reversal of 42402442129 is 92124420424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41269109904 + 1133332225 = 203148^2 + 33665^2 .

It is a cyclic number.

It is not a de Polignac number, because 42402442129 - 2¹ = 42402442127 is a prime.

Together with 42402442127, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 42402442094 and 42402442103.

It is not a weakly prime, because it can be changed into another prime (42402442127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21201221064 + 21201221065.

It is an arithmetic number, because the mean of its divisors is an integer number (21201221065).

Almost surely, 2^42402442129 is an apocalyptic number.

It is an amenable number.

42402442129 is a deficient number, since it is larger than the sum of its proper divisors (1).

42402442129 is an equidigital number, since it uses as much as digits as its factorization.

42402442129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 34.

The spelling of 42402442129 in words is "forty-two billion, four hundred two million, four hundred forty-two thousand, one hundred twenty-nine".