42135138 has 24 divisors (see below), whose sum is σ = 94238976. Its totient is φ = 13591800.

The previous prime is 42135133. The next prime is 42135143. The reversal of 42135138 is 83153124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42135133) and next prime (42135143).

It is not an unprimeable number, because it can be changed into a prime (42135133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37198 + ... + 38313.

It is an arithmetic number, because the mean of its divisors is an integer number (3926624).

Almost surely, 2^42135138 is an apocalyptic number.

42135138 is an abundant number, since it is smaller than the sum of its proper divisors (52103838).

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

42135138 is a wasteful number, since it uses less digits than its factorization.

42135138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75550 (or 75547 counting only the distinct ones).

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

The square root of 42135138 is about 6491.1584482279. The cubic root of 42135138 is about 347.9750774859.

The spelling of 42135138 in words is "forty-two million, one hundred thirty-five thousand, one hundred thirty-eight".