42385129 has 2 divisors, whose sum is σ = 42385130. Its totient is φ = 42385128.

The previous prime is 42385081. The next prime is 42385157. The reversal of 42385129 is 92158324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40297104 + 2088025 = 6348^2 + 1445^2 .

It is a cyclic number.

It is not a de Polignac number, because 42385129 - 2²⁵ = 8830697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42385094 and 42385103.

It is not a weakly prime, because it can be changed into another prime (42385169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21192564 + 21192565.

It is an arithmetic number, because the mean of its divisors is an integer number (21192565).

Almost surely, 2^42385129 is an apocalyptic number.

It is an amenable number.

42385129 is a deficient number, since it is larger than the sum of its proper divisors (1).

42385129 is an equidigital number, since it uses as much as digits as its factorization.

42385129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 42385129 is about 6510.3862404622. The cubic root of 42385129 is about 348.6619085241.

The spelling of 42385129 in words is "forty-two million, three hundred eighty-five thousand, one hundred twenty-nine".