42405129 has 24 divisors (see below), whose sum is σ = 67092480. Its totient is φ = 25648992.

The previous prime is 42405127. The next prime is 42405137. The reversal of 42405129 is 92150424.

It is not a de Polignac number, because 42405129 - 2¹ = 42405127 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42405127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3832 + ... + 9974.

It is an arithmetic number, because the mean of its divisors is an integer number (2795520).

Almost surely, 2^42405129 is an apocalyptic number.

It is an amenable number.

42405129 is a deficient number, since it is larger than the sum of its proper divisors (24687351).

42405129 is a wasteful number, since it uses less digits than its factorization.

42405129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6221 (or 6218 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 42405129 is about 6511.9220664870. The cubic root of 42405129 is about 348.7167401896.

The spelling of 42405129 in words is "forty-two million, four hundred five thousand, one hundred twenty-nine".