42129135 has 12 divisors (see below), whose sum is σ = 73023912. Its totient is φ = 22468848.

The previous prime is 42129119. The next prime is 42129149. The reversal of 42129135 is 53192124.

It is not a de Polignac number, because 42129135 - 2⁴ = 42129119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42129099 and 42129108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 468057 + ... + 468146.

It is an arithmetic number, because the mean of its divisors is an integer number (6085326).

Almost surely, 2^42129135 is an apocalyptic number.

42129135 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42129135 is a deficient number, since it is larger than the sum of its proper divisors (30894777).

42129135 is a wasteful number, since it uses less digits than its factorization.

42129135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936214 (or 936211 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 42129135 is about 6490.6960335545. The cubic root of 42129135 is about 347.9585513456.

The spelling of 42129135 in words is "forty-two million, one hundred twenty-nine thousand, one hundred thirty-five".