1721328787142 has 8 divisors (see below), whose sum is σ = 2582037196536. Its totient is φ = 860649721632.

The previous prime is 1721328787141. The next prime is 1721328787147. The reversal of 1721328787142 is 2417878231271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721328787141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7188728 + ... + 7424315.

It is an arithmetic number, because the mean of its divisors is an integer number (322754649567).

Almost surely, 2^{1721328787142} is an apocalyptic number.

1721328787142 is a deficient number, since it is larger than the sum of its proper divisors (860708409394).

1721328787142 is a wasteful number, since it uses less digits than its factorization.

1721328787142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14671942.

The product of its digits is 2107392, while the sum is 53.

The spelling of 1721328787142 in words is "one trillion, seven hundred twenty-one billion, three hundred twenty-eight million, seven hundred eighty-seven thousand, one hundred forty-two".