720213 has 16 divisors (see below), whose sum is σ = 1055040. Its totient is φ = 434304.

The previous prime is 720211. The next prime is 720221. The reversal of 720213 is 312027.

It is not a de Polignac number, because 720213 - 2¹ = 720211 is a prime.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 720192 and 720201.

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 720213.

It is not an unprimeable number, because it can be changed into a prime (720211) 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 15 ways as a sum of consecutive naturals, for example, 2145 + ... + 2457.

It is an arithmetic number, because the mean of its divisors is an integer number (65940).

2⁷²⁰²¹³ is an apocalyptic number.

It is an amenable number.

720213 is a deficient number, since it is larger than the sum of its proper divisors (334827).

720213 is a wasteful number, since it uses less digits than its factorization.

720213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 720213 is about 848.6536395963. The cubic root of 720213 is about 89.6369323858.

The spelling of 720213 in words is "seven hundred twenty thousand, two hundred thirteen".