1720064 has 18 divisors (see below), whose sum is σ = 3433920. Its totient is φ = 859904.

The previous prime is 1720063. The next prime is 1720109. The reversal of 1720064 is 4600271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3104 + ... + 3615.

2^1720064 is an apocalyptic number.

It is an amenable number.

1720064 is a deficient number, since it is larger than the sum of its proper divisors (1713856).

1720064 is an frugal number, since it uses more digits than its factorization.

1720064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6735 (or 6721 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 1720064 is about 1311.5121044047. The cubic root of 1720064 is about 119.8160143511.

The spelling of 1720064 in words is "one million, seven hundred twenty thousand, sixty-four".