42401240129 has 2 divisors, whose sum is σ = 42401240130. Its totient is φ = 42401240128.

The previous prime is 42401240107. The next prime is 42401240143. The reversal of 42401240129 is 92104210424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40914366529 + 1486873600 = 202273^2 + 38560^2 .

It is a cyclic number.

It is not a de Polignac number, because 42401240129 - 2²⁰ = 42400191553 is a prime.

It is not a weakly prime, because it can be changed into another prime (42401240429) 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, 21200620064 + 21200620065.

It is an arithmetic number, because the mean of its divisors is an integer number (21200620065).

Almost surely, 2^42401240129 is an apocalyptic number.

It is an amenable number.

42401240129 is a deficient number, since it is larger than the sum of its proper divisors (1).

42401240129 is an equidigital number, since it uses as much as digits as its factorization.

42401240129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 42401240129 in words is "forty-two billion, four hundred one million, two hundred forty thousand, one hundred twenty-nine".