2017721142 has 12 divisors (see below), whose sum is σ = 4371729180. Its totient is φ = 672573708.

The previous prime is 2017721141. The next prime is 2017721159. The reversal of 2017721142 is 2411277102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2017721141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56047792 + ... + 56047827.

It is an arithmetic number, because the mean of its divisors is an integer number (364310765).

Almost surely, 2^2017721142 is an apocalyptic number.

2017721142 is an abundant number, since it is smaller than the sum of its proper divisors (2354008038).

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

2017721142 is a wasteful number, since it uses less digits than its factorization.

2017721142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112095627 (or 112095624 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 2017721142 is about 44919.0509917563. The cubic root of 2017721142 is about 1263.6313196465.

Adding to 2017721142 its reverse (2411277102), we get a palindrome (4428998244).

The spelling of 2017721142 in words is "two billion, seventeen million, seven hundred twenty-one thousand, one hundred forty-two".