720003 has 8 divisors (see below), whose sum is σ = 969408. Its totient is φ = 475304.

The previous prime is 719989. The next prime is 720007. The reversal of 720003 is 300027.

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

It is a cyclic number.

It is not a de Polignac number, because 720003 - 2¹³ = 711811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720007) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 801 + ... + 1442.

It is an arithmetic number, because the mean of its divisors is an integer number (121176).

2⁷²⁰⁰⁰³ is an apocalyptic number.

720003 is a deficient number, since it is larger than the sum of its proper divisors (249405).

720003 is a wasteful number, since it uses less digits than its factorization.

720003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353.

The product of its (nonzero) digits is 42, while the sum is 12.

The square root of 720003 is about 848.5299051890. The cubic root of 720003 is about 89.6282194144.

It can be divided in two parts, 72000 and 3, that multiplied together give a cube (216000 = 60³).

The spelling of 720003 in words is "seven hundred twenty thousand, three", and thus it is an iban number.