720043 has 4 divisors (see below), whose sum is σ = 757960. Its totient is φ = 682128.

The previous prime is 720023. The next prime is 720053. The reversal of 720043 is 340027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 719999 and 720026.

It is not an unprimeable number, because it can be changed into a prime (720023) 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 3 ways as a sum of consecutive naturals, for example, 18930 + ... + 18967.

It is an arithmetic number, because the mean of its divisors is an integer number (189490).

2⁷²⁰⁰⁴³ is an apocalyptic number.

720043 is a deficient number, since it is larger than the sum of its proper divisors (37917).

720043 is a wasteful number, since it uses less digits than its factorization.

720043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37916.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 720043 is about 848.5534750386. The cubic root of 720043 is about 89.6298791586.

Subtracting from 720043 its sum of digits (16), we obtain a palindrome (720027).

The spelling of 720043 in words is "seven hundred twenty thousand, forty-three", and thus it is an iban number.