1721741142 has 64 divisors (see below), whose sum is σ = 3817352448. Its totient is φ = 513360000.

The previous prime is 1721741141. The next prime is 1721741171. The reversal of 1721741142 is 2411471271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721741141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1205833 + ... + 1207259.

It is an arithmetic number, because the mean of its divisors is an integer number (59646132).

Almost surely, 2^1721741142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1721741142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1908676224).

1721741142 is an abundant number, since it is smaller than the sum of its proper divisors (2095611306).

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

1721741142 is a wasteful number, since it uses less digits than its factorization.

1721741142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725.

The product of its digits is 3136, while the sum is 30.

The square root of 1721741142 is about 41493.8687278012. The cubic root of 1721741142 is about 1198.5494375414.

The spelling of 1721741142 in words is "one billion, seven hundred twenty-one million, seven hundred forty-one thousand, one hundred forty-two".