720243 has 12 divisors (see below), whose sum is σ = 1054560. Its totient is φ = 473616.

The previous prime is 720241. The next prime is 720253. The reversal of 720243 is 342027.

It is a happy number.

It is not a de Polignac number, because 720243 - 2¹ = 720241 is a prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720243.

It is not an unprimeable number, because it can be changed into a prime (720241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205 + ... + 1217.

It is an arithmetic number, because the mean of its divisors is an integer number (87880).

2⁷²⁰²⁴³ is an apocalyptic number.

720243 is a deficient number, since it is larger than the sum of its proper divisors (334317).

720243 is a wasteful number, since it uses less digits than its factorization.

720243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1095 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 720243 is about 848.6713144675. The cubic root of 720243 is about 89.6381769577.

It can be divided in two parts, 72024 and 3, that added together give a palindrome (72027).

The spelling of 720243 in words is "seven hundred twenty thousand, two hundred forty-three", and thus it is an iban number.