1720041 has 8 divisors (see below), whose sum is σ = 2309184. Its totient is φ = 1138800.

The previous prime is 1720039. The next prime is 1720049. The reversal of 1720041 is 1400271.

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

It is not a de Polignac number, because 1720041 - 2¹ = 1720039 is a prime.

1720041 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1720041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1446 + ... + 2351.

It is an arithmetic number, because the mean of its divisors is an integer number (288648).

2^1720041 is an apocalyptic number.

It is an amenable number.

1720041 is a deficient number, since it is larger than the sum of its proper divisors (589143).

1720041 is a wasteful number, since it uses less digits than its factorization.

1720041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3951.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 1720041 is about 1311.5033358707. The cubic root of 1720041 is about 119.8154803050.

The spelling of 1720041 in words is "one million, seven hundred twenty thousand, forty-one".