42135012 has 72 divisors (see below), whose sum is σ = 112368480. Its totient is φ = 13653360.

The previous prime is 42134987. The next prime is 42135013. The reversal of 42135012 is 21053124.

42135012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (42135013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199587 + ... + 199797.

Almost surely, 2^42135012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42135012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56184240).

42135012 is an abundant number, since it is smaller than the sum of its proper divisors (70233468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42135012 is a wasteful number, since it uses less digits than its factorization.

42135012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 42135012 is about 6491.1487427111. The cubic root of 42135012 is about 347.9747306265.

Adding to 42135012 its reverse (21053124), we get a palindrome (63188136).

The spelling of 42135012 in words is "forty-two million, one hundred thirty-five thousand, twelve".