720543 has 8 divisors (see below), whose sum is σ = 964656. Its totient is φ = 478400.

The previous prime is 720527. The next prime is 720547. The reversal of 720543 is 345027.

It is a happy number.

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 720543 - 2⁴ = 720527 is a prime.

720543 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720543.

It is not an unprimeable number, because it can be changed into a prime (720547) 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, 1123 + ... + 1643.

It is an arithmetic number, because the mean of its divisors is an integer number (120582).

2⁷²⁰⁵⁴³ is an apocalyptic number.

720543 is a deficient number, since it is larger than the sum of its proper divisors (244113).

720543 is a wasteful number, since it uses less digits than its factorization.

720543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 720543 is about 848.8480429382. The cubic root of 720543 is about 89.6506207765.

The spelling of 720543 in words is "seven hundred twenty thousand, five hundred forty-three".