42771138 has 16 divisors (see below), whose sum is σ = 86714976. Its totient is φ = 14061600.

The previous prime is 42771121. The next prime is 42771139. The reversal of 42771138 is 83117724.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 42771099 and 42771108.

It is not an unprimeable number, because it can be changed into a prime (42771139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48388 + ... + 49263.

It is an arithmetic number, because the mean of its divisors is an integer number (5419686).

Almost surely, 2^42771138 is an apocalyptic number.

42771138 is an abundant number, since it is smaller than the sum of its proper divisors (43943838).

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

42771138 is a wasteful number, since it uses less digits than its factorization.

42771138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97729.

The product of its digits is 9408, while the sum is 33.

The square root of 42771138 is about 6539.9646788037. The cubic root of 42771138 is about 349.7171537974.

The spelling of 42771138 in words is "forty-two million, seven hundred seventy-one thousand, one hundred thirty-eight".