42555138 has 16 divisors (see below), whose sum is σ = 85954176. Its totient is φ = 14044400.

The previous prime is 42555127. The next prime is 42555169. The reversal of 42555138 is 83155524.

It is a junction number, because it is equal to n+sod(n) for n = 42555099 and 42555108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34506 + ... + 35717.

It is an arithmetic number, because the mean of its divisors is an integer number (5372136).

Almost surely, 2^42555138 is an apocalyptic number.

42555138 is an abundant number, since it is smaller than the sum of its proper divisors (43399038).

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

42555138 is a wasteful number, since it uses less digits than its factorization.

42555138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70329.

The product of its digits is 24000, while the sum is 33.

The square root of 42555138 is about 6523.4299260435. The cubic root of 42555138 is about 349.1274537702.

The spelling of 42555138 in words is "forty-two million, five hundred fifty-five thousand, one hundred thirty-eight".