720546 has 8 divisors (see below), whose sum is σ = 1441104. Its totient is φ = 240180.

The previous prime is 720527. The next prime is 720547. The reversal of 720546 is 645027.

It is a happy number.

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

720546 is an admirable number.

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 720546.

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 3 ways as a sum of consecutive naturals, for example, 60040 + ... + 60051.

It is an arithmetic number, because the mean of its divisors is an integer number (180138).

2⁷²⁰⁵⁴⁶ is an apocalyptic number.

720546 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

720546 is a wasteful number, since it uses less digits than its factorization.

720546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120096.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 720546 is about 848.8498100371. The cubic root of 720546 is about 89.6507451973.

The spelling of 720546 in words is "seven hundred twenty thousand, five hundred forty-six".