724745 has 8 divisors (see below), whose sum is σ = 993984. Its totient is φ = 496944.

The previous prime is 724733. The next prime is 724747. The reversal of 724745 is 547427.

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

It is not a de Polignac number, because 724745 - 2⁴ = 724729 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (724747) 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, 10319 + ... + 10388.

It is an arithmetic number, because the mean of its divisors is an integer number (124248).

2⁷²⁴⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

724745 is a deficient number, since it is larger than the sum of its proper divisors (269239).

724745 is a wasteful number, since it uses less digits than its factorization.

724745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20719.

The product of its digits is 7840, while the sum is 29.

The square root of 724745 is about 851.3195639711. The cubic root of 724745 is about 89.8245553323.

The spelling of 724745 in words is "seven hundred twenty-four thousand, seven hundred forty-five".