1720441 has 4 divisors (see below), whose sum is σ = 1724800. Its totient is φ = 1716084.

The previous prime is 1720429. The next prime is 1720457. The reversal of 1720441 is 1440271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1720441 - 2¹¹ = 1718393 is a prime.

It is a super-4 number, since 4×1720441⁴ (a number of 26 digits) contains 4444 as substring.

It is a Duffinian number.

1720441 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1720421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1521 + ... + 2398.

It is an arithmetic number, because the mean of its divisors is an integer number (431200).

2^1720441 is an apocalyptic number.

It is an amenable number.

1720441 is a deficient number, since it is larger than the sum of its proper divisors (4359).

1720441 is an equidigital number, since it uses as much as digits as its factorization.

1720441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4358.

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

The square root of 1720441 is about 1311.6558237587. The cubic root of 1720441 is about 119.8247673855.

The spelling of 1720441 in words is "one million, seven hundred twenty thousand, four hundred forty-one".