1720144 has 10 divisors (see below), whose sum is σ = 3332810. Its totient is φ = 860064.

The previous prime is 1720133. The next prime is 1720151. The reversal of 1720144 is 4410271.

It can be written as a sum of positive squares in only one way, i.e., 1345600 + 374544 = 1160^2 + 612^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53739 + ... + 53770.

It is an arithmetic number, because the mean of its divisors is an integer number (333281).

2^1720144 is an apocalyptic number.

It is an amenable number.

1720144 is a deficient number, since it is larger than the sum of its proper divisors (1612666).

1720144 is a wasteful number, since it uses less digits than its factorization.

1720144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107517 (or 107511 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 1720144 is about 1311.5426031967. The cubic root of 1720144 is about 119.8178718658.

The spelling of 1720144 in words is "one million, seven hundred twenty thousand, one hundred forty-four".