1720473 has 8 divisors (see below), whose sum is σ = 2347488. Its totient is φ = 1120224.

The previous prime is 1720471. The next prime is 1720513. The reversal of 1720473 is 3740271.

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

It is not a de Polignac number, because 1720473 - 2¹ = 1720471 is a prime.

1720473 is a modest number, since divided by 473 gives 172 as remainder.

It is a Curzon number.

1720473 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1720471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6540 + ... + 6797.

It is an arithmetic number, because the mean of its divisors is an integer number (293436).

2^1720473 is an apocalyptic number.

It is an amenable number.

1720473 is a deficient number, since it is larger than the sum of its proper divisors (627015).

1720473 is a wasteful number, since it uses less digits than its factorization.

1720473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13383.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 1720473 is about 1311.6680220239. The cubic root of 1720473 is about 119.8255102897.

The spelling of 1720473 in words is "one million, seven hundred twenty thousand, four hundred seventy-three".