1720741 has 6 divisors (see below), whose sum is σ = 1891526. Its totient is φ = 1564200.

The previous prime is 1720711. The next prime is 1720769. The reversal of 1720741 is 1470271.

It can be written as a sum of positive squares in only one way, i.e., 1572516 + 148225 = 1254^2 + 385^2 .

It is not a de Polignac number, because 1720741 - 2⁵ = 1720709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6990 + ... + 7231.

2^1720741 is an apocalyptic number.

1720741 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1720741 is a deficient number, since it is larger than the sum of its proper divisors (170785).

1720741 is a wasteful number, since it uses less digits than its factorization.

1720741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14243 (or 14232 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 1720741 is about 1311.7701780419. The cubic root of 1720741 is about 119.8317317512.

The spelling of 1720741 in words is "one million, seven hundred twenty thousand, seven hundred forty-one".