1720071325 has 12 divisors (see below), whose sum is σ = 2437587040. Its totient is φ = 1179477360.

The previous prime is 1720071317. The next prime is 1720071329. The reversal of 1720071325 is 5231700271.

It is not a de Polignac number, because 1720071325 - 2³ = 1720071317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1720071293 and 1720071302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720071329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4914315 + ... + 4914664.

Almost surely, 2^1720071325 is an apocalyptic number.

It is an amenable number.

1720071325 is a deficient number, since it is larger than the sum of its proper divisors (717515715).

1720071325 is an equidigital number, since it uses as much as digits as its factorization.

1720071325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9828996 (or 9828991 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 1720071325 is about 41473.7425969733. The cubic root of 1720071325 is about 1198.1618443223.

Adding to 1720071325 its reverse (5231700271), we get a palindrome (6951771596).

The spelling of 1720071325 in words is "one billion, seven hundred twenty million, seventy-one thousand, three hundred twenty-five".