1720142324105 has 4 divisors (see below), whose sum is σ = 2064170788932. Its totient is φ = 1376113859280.

The previous prime is 1720142324063. The next prime is 1720142324179. The reversal of 1720142324105 is 5014232410271.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 305044126864 + 1415098197241 = 552308^2 + 1189579^2 .

It is not a de Polignac number, because 1720142324105 - 2¹⁸ = 1720142061961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172014232406 + ... + 172014232415.

It is an arithmetic number, because the mean of its divisors is an integer number (516042697233).

Almost surely, 2^{1720142324105} is an apocalyptic number.

It is an amenable number.

1720142324105 is a deficient number, since it is larger than the sum of its proper divisors (344028464827).

1720142324105 is an equidigital number, since it uses as much as digits as its factorization.

1720142324105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344028464826.

The product of its (nonzero) digits is 13440, while the sum is 32.

Adding to 1720142324105 its reverse (5014232410271), we get a palindrome (6734374734376).

The spelling of 1720142324105 in words is "one trillion, seven hundred twenty billion, one hundred forty-two million, three hundred twenty-four thousand, one hundred five".